29 tools ready to use
Free online calculators
Solve percentage, price, finance, body-measurement, fitness, and home-project problems with clear, focused calculators.
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Popular calculators
Start with a common calculation and see the result as you work.
Percentage Calculator
Calculate percentages, find what percent one number is of another, and compute percentage change between values.
Open toolDiscount Calculator
Calculate discounted prices with one or more stacked discounts. See savings instantly.
Open toolTip Calculator
Calculate tip amounts, split bills among friends, and round up totals for easy payment.
Open toolEMI Calculator
Calculate Equated Monthly Installments for loans with a full amortization breakdown of principal and interest.
Open toolScientific Calculator
A full-featured scientific calculator with trigonometry, logarithms, exponents, memory, and calculation history.
Open toolUnit Price Calculator
Compare up to four products side-by-side to find the best value based on unit price.
Open toolVolume Calculator
Calculate space, capacity, or material volume for prisms, tanks, pipes, spheres, cones, pyramids, and more.
Open toolPaint Calculator
Estimate paint cans for room walls with allowances for doors, windows, coats, coverage, waste, and material cost.
Open toolFlooring Calculator
Estimate flooring area, cutting waste, boxes, and material cost for laminate, vinyl, hardwood, or engineered floors.
Open toolConcrete Calculator
Estimate concrete volume, bag quantity, extra allowance, and material cost for rectangular slabs and footings.
Open toolAdult BMI Calculator
Calculate adult body mass index from metric or US customary height and weight with a clearly labeled screening category.
Open toolBody-Fat Estimate Calculator
Estimate adult body-fat percentage with the U.S. Navy circumference method and measurement guidance.
Open toolRunning Pace & Split Calculator
Calculate average running pace, speed, and same-pace 5 km and 10 km splits from distance and time.
Open toolAll calculators
General
Percentage Calculator
Calculate percentages, find what percent one number is of another, and compute percentage change between values.
Open toolDiscount Calculator
Calculate discounted prices with one or more stacked discounts. See savings instantly.
Open toolTip Calculator
Calculate tip amounts, split bills among friends, and round up totals for easy payment.
Open toolEMI Calculator
Calculate Equated Monthly Installments for loans with a full amortization breakdown of principal and interest.
Open toolScientific Calculator
A full-featured scientific calculator with trigonometry, logarithms, exponents, memory, and calculation history.
Open toolAverage Calculator
Compute mean, median, mode, range, sum, standard deviation, and other statistics for a set of numbers.
Open toolRatio Calculator
Simplify ratios, solve proportions for a missing value, and distribute totals by ratio.
Open toolUnit Price Calculator
Compare up to four products side-by-side to find the best value based on unit price.
Open toolVolume Calculator
Calculate space, capacity, or material volume for prisms, tanks, pipes, spheres, cones, pyramids, and more.
Open toolHome & DIY Calculators
Paint Calculator
Estimate paint cans for room walls with allowances for doors, windows, coats, coverage, waste, and material cost.
Open toolFlooring Calculator
Estimate flooring area, cutting waste, boxes, and material cost for laminate, vinyl, hardwood, or engineered floors.
Open toolTile Calculator
Estimate tiles and boxes for a floor or wall using surface size, tile dimensions, grout gap, waste, and package quantity.
Open toolConcrete Calculator
Estimate concrete volume, bag quantity, extra allowance, and material cost for rectangular slabs and footings.
Open toolWallpaper Calculator
Estimate wallpaper drops and rolls with allowances for room dimensions, openings, pattern repeat, waste, and cost.
Open toolMulch, Soil & Gravel Calculator
Estimate landscaping material volume, bag quantity, extra allowance, and cost from the measured area and depth.
Open toolFence Calculator
Estimate fence panels, posts, gate openings, extra allowance, and basic panel-and-post material cost.
Open toolDecking Calculator
Estimate deck boards, approximate joist lines, spacing, cutting waste, and board material cost.
Open toolBody & Fitness Calculators
Adult BMI Calculator
Calculate adult body mass index from metric or US customary height and weight with a clearly labeled screening category.
Open toolBMI-Based Weight Range Calculator
Find the weights corresponding to the adult BMI screening range of 18.5 through 24.9 for a given height.
Open toolWaist-to-Height Ratio Calculator
Compare adult waist circumference with height and view the same-unit screening ratio.
Open toolWaist-to-Hip Ratio Calculator
Calculate waist circumference relative to hip circumference without applying a universal diagnostic label.
Open toolBody-Fat Estimate Calculator
Estimate adult body-fat percentage with the U.S. Navy circumference method and measurement guidance.
Open toolLean Mass & Fat Mass Calculator
Split body weight into estimated fat mass and fat-free mass using an entered body-fat percentage.
Open toolFFMI Calculator
Calculate fat-free mass index and fat mass index from height, weight, and body-fat percentage.
Open toolBMR / Resting Energy Calculator
Estimate adult resting energy expenditure with the Mifflin–St Jeor predictive equation.
Open toolTDEE Calculator
Estimate total daily energy expenditure from resting energy and a clearly stated activity multiplier.
Open toolRunning Pace & Split Calculator
Calculate average running pace, speed, and same-pace 5 km and 10 km splits from distance and time.
Open toolWalking Pace Calculator
Calculate average walking speed, pace, and same-pace distance for 30 or 60 minutes.
Open toolWeight-Change Percentage Calculator
Calculate the numerical amount and percentage change between starting and current body weight.
Open tool