{
  "version": "1.0.0",
  "updated": "2026-10-01",
  "count": 31,
  "authentication": "none",
  "calculationTransport": "browser-webmcp",
  "calculators": [
    {
      "id": "grade-calculator",
      "name": "Final Grade Calculator",
      "category": "Education",
      "description": "Find the final exam score needed for your target course grade. Enter your current grade and exam weight to see the required score and calculation steps.",
      "url": "https://precisecalculator.com/calculators/grade-calculator/",
      "keywords": [
        "finals",
        "final",
        "exam",
        "course",
        "grade",
        "weighted",
        "grade",
        "student",
        "school"
      ],
      "browserTool": "calculate_grade_calculator"
    },
    {
      "id": "hours-calculator",
      "name": "Hours Calculator",
      "category": "Time & Pay",
      "description": "Calculate hours and minutes between start and end times, including overnight shifts. See decimal hours and total minutes, with clear timesheet examples.",
      "url": "https://precisecalculator.com/calculators/hours-calculator/",
      "keywords": [
        "hours",
        "between",
        "times",
        "clock",
        "work",
        "shift",
        "duration",
        "overnight"
      ],
      "browserTool": "calculate_hours_calculator"
    },
    {
      "id": "time-calculator",
      "name": "Time Calculator",
      "category": "Time & Pay",
      "description": "Add or subtract durations in days, hours, minutes and seconds. Get a normalized result with a worked example, including negative-duration handling.",
      "url": "https://precisecalculator.com/calculators/time-calculator/",
      "keywords": [
        "add",
        "time",
        "subtract",
        "time",
        "duration",
        "expression",
        "days",
        "hours",
        "minutes",
        "seconds"
      ],
      "browserTool": "calculate_time_calculator"
    },
    {
      "id": "time-duration-calculator",
      "name": "Time Duration Calculator",
      "category": "Time & Pay",
      "description": "Find the time between two dates and clock times in days, hours and minutes. Includes total hours, leap-day examples and an explanation of time-zone limits.",
      "url": "https://precisecalculator.com/calculators/time-duration-calculator/",
      "keywords": [
        "time",
        "duration",
        "date",
        "difference",
        "elapsed",
        "time",
        "days",
        "hours",
        "between",
        "dates"
      ],
      "browserTool": "calculate_time_duration_calculator"
    },
    {
      "id": "age-calculator",
      "name": "Chronological Age Calculator",
      "category": "Everyday",
      "description": "Calculate chronological age from a birth date and an as-of date. See completed years, months and days, plus total elapsed days and approximate weeks.",
      "url": "https://precisecalculator.com/calculators/age-calculator/",
      "keywords": [
        "chronological",
        "age",
        "calculator",
        "date",
        "of",
        "birth",
        "birthday",
        "years",
        "months",
        "days"
      ],
      "browserTool": "calculate_age_calculator"
    },
    {
      "id": "gravel-calculator",
      "name": "Gravel Calculator",
      "category": "Construction",
      "description": "Calculate gravel for a driveway or landscaping area from dimensions and depth. Estimate cubic yards, US tons and cost using your supplier’s bulk density.",
      "url": "https://precisecalculator.com/calculators/gravel-calculator/",
      "keywords": [
        "gravel",
        "rock",
        "aggregate",
        "cubic",
        "yards",
        "tons",
        "driveway",
        "landscaping"
      ],
      "browserTool": "calculate_gravel_calculator"
    },
    {
      "id": "mulch-calculator",
      "name": "Mulch Calculator",
      "category": "Construction",
      "description": "Work out how much mulch you need from bed length, width and depth. Calculate cubic yards, cubic feet, full bags and bag cost for a rectangular garden bed.",
      "url": "https://precisecalculator.com/calculators/mulch-calculator/",
      "keywords": [
        "mulch",
        "garden",
        "bed",
        "cubic",
        "yards",
        "bags",
        "depth",
        "landscaping"
      ],
      "browserTool": "calculate_mulch_calculator"
    },
    {
      "id": "voltage-drop-calculator",
      "name": "Voltage Drop Calculator",
      "category": "Construction",
      "description": "Estimate wire voltage drop in volts and percent from AWG size, current and one-way distance. Supports copper, aluminum and a resistive three-phase model.",
      "url": "https://precisecalculator.com/calculators/voltage-drop-calculator/",
      "keywords": [
        "voltage",
        "drop",
        "wire",
        "gauge",
        "copper",
        "aluminum",
        "amps",
        "distance",
        "electrical"
      ],
      "browserTool": "calculate_voltage_drop_calculator"
    },
    {
      "id": "bond-calculator",
      "name": "Bond & Savings Value Calculator",
      "category": "Finance",
      "description": "Calculate fixed-rate bond price or yield to maturity from coupon rate, face value and term. Includes a known-rate savings projection and worked examples.",
      "url": "https://precisecalculator.com/calculators/bond-calculator/",
      "keywords": [
        "savings",
        "bond",
        "calculator",
        "price",
        "yield",
        "maturity",
        "coupon",
        "present",
        "value",
        "fixed",
        "rate"
      ],
      "browserTool": "calculate_bond_calculator"
    },
    {
      "id": "cd-calculator",
      "name": "CD Interest Calculator",
      "category": "Finance",
      "description": "Estimate CD interest and maturity balance from deposit, rate and term. Choose APY or nominal APR, compare compounding, and see an optional tax illustration.",
      "url": "https://precisecalculator.com/calculators/cd-calculator/",
      "keywords": [
        "cd",
        "rate",
        "interest",
        "certificate",
        "deposit",
        "apy",
        "maturity",
        "compound",
        "savings"
      ],
      "browserTool": "calculate_cd_calculator"
    },
    {
      "id": "stair-calculator",
      "name": "Stair Calculator",
      "category": "Construction",
      "description": "Plan a straight stair using total rise, target riser height and tread depth. See riser count, actual rise, total run, angle and geometric stringer length.",
      "url": "https://precisecalculator.com/calculators/stair-calculator/",
      "keywords": [
        "stairs",
        "riser",
        "tread",
        "stringer",
        "rise",
        "run",
        "steps",
        "construction"
      ],
      "browserTool": "calculate_stair_calculator"
    },
    {
      "id": "roofing-calculator",
      "name": "Roof Pitch & Area Calculator",
      "category": "Construction",
      "description": "Convert roof rise and run to pitch angle and slope. Use horizontal roof area to estimate sloped surface area, waste allowance and 100-square-foot roofing squares.",
      "url": "https://precisecalculator.com/calculators/roofing-calculator/",
      "keywords": [
        "roof",
        "pitch",
        "angle",
        "slope",
        "area",
        "shingles",
        "squares",
        "rise",
        "run"
      ],
      "browserTool": "calculate_roofing_calculator"
    },
    {
      "id": "salary-calculator",
      "name": "Salary Increase Calculator",
      "category": "Finance",
      "description": "Calculate your new salary from a raise percentage, or find the raise between old and new pay. See annual and per-pay-period changes before deductions.",
      "url": "https://precisecalculator.com/calculators/salary-calculator/",
      "keywords": [
        "salary",
        "increase",
        "raise",
        "percentage",
        "pay",
        "monthly",
        "biweekly",
        "annual"
      ],
      "browserTool": "calculate_salary_calculator"
    },
    {
      "id": "scientific-calculator",
      "name": "Scientific Calculator",
      "category": "Math",
      "description": "Use an online scientific calculator for trigonometry, logarithms, powers, roots and factorials. Switch between degrees and radians and review expression rules.",
      "url": "https://precisecalculator.com/calculators/scientific-calculator/",
      "keywords": [
        "scientific",
        "calculator",
        "sin",
        "cos",
        "tan",
        "logarithm",
        "square",
        "root",
        "exponent",
        "factorial"
      ],
      "browserTool": "calculate_scientific_calculator"
    },
    {
      "id": "scientific-notation-calculator",
      "name": "Scientific Notation Calculator",
      "category": "Math",
      "description": "Convert decimals and E-notation to scientific notation. Add, subtract, multiply or divide values using exact decimal arithmetic and controlled division precision.",
      "url": "https://precisecalculator.com/calculators/scientific-notation-calculator/",
      "keywords": [
        "scientific",
        "notation",
        "converter",
        "e",
        "notation",
        "engineering",
        "notation",
        "exponent"
      ],
      "browserTool": "calculate_scientific_notation_calculator"
    },
    {
      "id": "time-card-calculator",
      "name": "Overtime & Time Card Calculator",
      "category": "Time & Pay",
      "description": "Total weekly work hours from daily start and end times. Deduct unpaid breaks and estimate regular pay and overtime using your chosen threshold and multiplier.",
      "url": "https://precisecalculator.com/calculators/time-card-calculator/",
      "keywords": [
        "overtime",
        "calculator",
        "time",
        "and",
        "a",
        "half",
        "time",
        "card",
        "weekly",
        "hours",
        "gross",
        "pay"
      ],
      "browserTool": "calculate_time_card_calculator"
    },
    {
      "id": "fraction-calculator",
      "name": "Mixed Fraction Calculator",
      "category": "Math",
      "description": "Calculate with fractions, mixed numbers and whole numbers. Get a simplified exact fraction, mixed-number answer and decimal, with worked arithmetic examples.",
      "url": "https://precisecalculator.com/calculators/fraction-calculator/",
      "keywords": [
        "mixed",
        "fraction",
        "calculator",
        "fractions",
        "simplify",
        "add",
        "subtract",
        "multiply",
        "divide"
      ],
      "browserTool": "calculate_fraction_calculator"
    },
    {
      "id": "gpa-calculator",
      "name": "Cumulative & Weighted GPA Calculator",
      "category": "Education",
      "description": "Calculate term or cumulative GPA using course grades and credits. Add prior GPA and credits, and apply optional course boosts for a weighted result.",
      "url": "https://precisecalculator.com/calculators/gpa-calculator/",
      "keywords": [
        "cumulative",
        "gpa",
        "weighted",
        "gpa",
        "grades",
        "credits",
        "college",
        "high",
        "school"
      ],
      "browserTool": "calculate_gpa_calculator"
    },
    {
      "id": "body-surface-area-calculator",
      "name": "Body Surface Area Calculator",
      "category": "Health & Fitness",
      "description": "Calculate body surface area from height and weight. Compare Mosteller, Du Bois and three other formulas using metric or US units, with method limits.",
      "url": "https://precisecalculator.com/calculators/body-surface-area-calculator/",
      "keywords": [
        "body",
        "surface",
        "area",
        "bsa",
        "mosteller",
        "dubois",
        "height",
        "weight",
        "medical"
      ],
      "browserTool": "calculate_body_surface_area_calculator"
    },
    {
      "id": "golf-handicap-calculator",
      "name": "Golf Handicap Calculator",
      "category": "Health & Fitness",
      "description": "Calculate Course Handicap and Score Differential, or estimate an index from 3–20 recent 18-hole differentials. Review the assumptions and worked example.",
      "url": "https://precisecalculator.com/calculators/golf-handicap-calculator/",
      "keywords": [
        "golf",
        "handicap",
        "index",
        "course",
        "handicap",
        "slope",
        "rating",
        "score",
        "differential",
        "whs"
      ],
      "browserTool": "calculate_golf_handicap_calculator"
    },
    {
      "id": "body-fat-calculator",
      "name": "Body Fat Calculator",
      "category": "Health & Fitness",
      "description": "Estimate body fat with the U.S. Navy circumference method using height and tape measurements. Add weight to estimate fat mass and lean mass.",
      "url": "https://precisecalculator.com/calculators/body-fat-calculator/",
      "keywords": [
        "body",
        "fat",
        "navy",
        "method",
        "waist",
        "neck",
        "hip",
        "height",
        "percentage",
        "lean",
        "mass"
      ],
      "browserTool": "calculate_body_fat_calculator"
    },
    {
      "id": "army-body-fat-calculator",
      "name": "Army Body Fat Calculator",
      "category": "Health & Fitness",
      "description": "Estimate Army body fat using weight and abdominal circumference with the June 2023 one-site equations. Review the method, inputs and limitations.",
      "url": "https://precisecalculator.com/calculators/army-body-fat-calculator/",
      "keywords": [
        "army",
        "pt",
        "body",
        "fat",
        "calculator",
        "abcp",
        "tape",
        "test",
        "waist",
        "abdomen",
        "weight",
        "standard"
      ],
      "browserTool": "calculate_army_body_fat_calculator"
    },
    {
      "id": "square-footage-calculator",
      "name": "Square Footage Calculator",
      "category": "Construction",
      "description": "Calculate square feet for a room, wall, circle or triangle. Convert area to square meters, square yards and acres, with measurement examples and formulas.",
      "url": "https://precisecalculator.com/calculators/square-footage-calculator/",
      "keywords": [
        "square",
        "footage",
        "calculator",
        "square",
        "feet",
        "calculator",
        "area",
        "room",
        "floor",
        "wall",
        "circle",
        "triangle",
        "feet",
        "meters",
        "yards",
        "acres"
      ],
      "browserTool": "calculate_square_footage_calculator"
    },
    {
      "id": "average-calculator",
      "name": "Average Calculator",
      "category": "Math",
      "description": "Find the mean of a number list or calculate a weighted average. See count, sum, median and range, with worked examples and clear input guidance.",
      "url": "https://precisecalculator.com/calculators/average-calculator/",
      "keywords": [
        "average",
        "calculator",
        "mean",
        "weighted",
        "average",
        "numbers",
        "sum",
        "count",
        "range",
        "arithmetic",
        "mean"
      ],
      "browserTool": "calculate_average_calculator"
    },
    {
      "id": "cpm-calculator",
      "name": "CPM Calculator",
      "category": "Finance",
      "description": "Calculate CPM, campaign cost or impressions from the other two values. See the cost-per-thousand formula and an example for planning an ad budget.",
      "url": "https://precisecalculator.com/calculators/cpm-calculator/",
      "keywords": [
        "cpm",
        "calculator",
        "cost",
        "per",
        "mille",
        "thousand",
        "impressions",
        "advertising",
        "campaign",
        "media",
        "budget"
      ],
      "browserTool": "calculate_cpm_calculator"
    },
    {
      "id": "dividend-calculator",
      "name": "Dividend Calculator",
      "category": "Finance",
      "description": "Estimate dividend yield and annual income from investment, share price and dividend per share. Explore a simplified dividend-growth and reinvestment scenario.",
      "url": "https://precisecalculator.com/calculators/dividend-calculator/",
      "keywords": [
        "dividend",
        "calculator",
        "dividend",
        "yield",
        "income",
        "investment",
        "shares",
        "drip",
        "reinvestment",
        "growth"
      ],
      "browserTool": "calculate_dividend_calculator"
    },
    {
      "id": "asphalt-calculator",
      "name": "Asphalt Calculator",
      "category": "Construction",
      "description": "Estimate asphalt for a rectangular driveway or paving area. Enter length, width, depth and density to calculate US tons, cubic yards and material cost.",
      "url": "https://precisecalculator.com/calculators/asphalt-calculator/",
      "keywords": [
        "asphalt",
        "calculator",
        "blacktop",
        "pavement",
        "tons",
        "driveway",
        "depth",
        "density",
        "bitumen",
        "square",
        "feet"
      ],
      "browserTool": "calculate_asphalt_calculator"
    },
    {
      "id": "credit-card-payoff-calculator",
      "name": "Credit Card Payoff Calculator",
      "category": "Finance",
      "description": "Estimate credit card payoff time with a fixed monthly payment. See total interest, fees and final payment under a clearly explained monthly-rate model.",
      "url": "https://precisecalculator.com/calculators/credit-card-payoff-calculator/",
      "keywords": [
        "credit",
        "card",
        "payoff",
        "calculator",
        "debt",
        "payment",
        "APR",
        "interest",
        "months",
        "total",
        "interest",
        "balance"
      ],
      "browserTool": "calculate_credit_card_payoff_calculator"
    },
    {
      "id": "markup-calculator",
      "name": "Markup Calculator",
      "category": "Finance",
      "description": "Find selling price from cost and markup percentage. See gross profit and the corresponding margin, with an example showing why markup and margin differ.",
      "url": "https://precisecalculator.com/calculators/markup-calculator/",
      "keywords": [
        "markup",
        "calculator",
        "price",
        "cost",
        "profit",
        "margin",
        "retail",
        "wholesale",
        "percentage",
        "selling",
        "price"
      ],
      "browserTool": "calculate_markup_calculator"
    },
    {
      "id": "median-calculator",
      "name": "Median Calculator",
      "category": "Math",
      "description": "Find the median of a number list, including decimals and negatives. See count, mean, minimum, maximum and sum, with odd- and even-count examples.",
      "url": "https://precisecalculator.com/calculators/median-calculator/",
      "keywords": [
        "median",
        "calculator",
        "middle",
        "number",
        "data",
        "set",
        "statistics",
        "mean",
        "average",
        "sorted",
        "values"
      ],
      "browserTool": "calculate_median_calculator"
    },
    {
      "id": "volume-calculator",
      "name": "Volume Calculator",
      "category": "Math",
      "description": "Calculate volume for cylinders, boxes, cones, spheres and more. Enter dimensions in one unit to get cubic meters, liters, cubic feet and US gallons.",
      "url": "https://precisecalculator.com/calculators/volume-calculator/",
      "keywords": [
        "volume",
        "of",
        "cylinder",
        "calculator",
        "sphere",
        "cone",
        "cube",
        "tank",
        "frustum",
        "ellipsoid"
      ],
      "browserTool": "calculate_volume_calculator"
    }
  ]
}