Free online calculators that show their work — every tool explains its formula, cites its sources, and runs entirely in your browser.https://calcbadger.com/https://calcbadger.com/words-per-minute-average/https://calcbadger.com/words-per-minute-average/Turn a word or character count, time taken, and error count into gross WPM, net WPM, and accuracy, then see it placed against published typing-speed research.Fri, 11 Sep 2026 00:00:00 GMTText Toolshttps://calcbadger.com/rice-to-water-ratio/https://calcbadger.com/rice-to-water-ratio/Find how much water a given amount of dry rice needs, by type (white, brown, jasmine, basmati, arborio, wild rice, and more), using USA Rice's stovetop ratios, plus the estimated cooked yield.Thu, 03 Sep 2026 00:00:00 GMTFood & Drinkhttps://calcbadger.com/golf-club-distance-chart/https://calcbadger.com/golf-club-distance-chart/See typical yardage for every club in the bag by skill level, or enter your own driver distance to scale the whole chart to your swing, plus the yard gap between each club.Wed, 02 Sep 2026 00:00:00 GMTSportshttps://calcbadger.com/electrical-converter/https://calcbadger.com/electrical-converter/Convert between watts, amps, and volts for DC, AC single-phase, and AC three-phase circuits, with power factor support and worked examples for household and industrial loads.Tue, 01 Sep 2026 00:00:00 GMTConversionhttps://calcbadger.com/number-base-converter/https://calcbadger.com/number-base-converter/Convert between binary, octal, decimal, and hexadecimal instantly, with a byte-value reference table and worked examples of the place-value math.Fri, 28 Aug 2026 00:00:00 GMTConversionhttps://calcbadger.com/system-of-equations-solver/https://calcbadger.com/system-of-equations-solver/Solve a system of 2 or 3 linear equations by Gaussian elimination, entered as ax + by = c (or ax + by + cz = d). Reports the exact solution, or whether it has none or infinitely many.Thu, 27 Aug 2026 00:00:00 GMTMathhttps://calcbadger.com/keyboard-test/https://calcbadger.com/keyboard-test/Test every key on your keyboard with a live virtual layout, check how many keys register at once (rollover), and see which keys never registered.Wed, 26 Aug 2026 00:00:00 GMTTechhttps://calcbadger.com/dead-pixel-test/https://calcbadger.com/dead-pixel-test/Check a monitor, laptop, or phone screen for dead, hot, and stuck pixels with a full-screen color test, plus a pixel-refresh flash mode for stuck sub-pixels.Tue, 25 Aug 2026 00:00:00 GMTTechhttps://calcbadger.com/words-to-pages-calculator/https://calcbadger.com/words-to-pages-calculator/Convert a word count into an estimated page count (or the reverse), based on font, size, and line spacing. Uses the standard 250-words-per-page, double-spaced convention as the baseline.Mon, 24 Aug 2026 00:00:00 GMTEducationhttps://calcbadger.com/ffmi-calculator/https://calcbadger.com/ffmi-calculator/Calculate your Fat-Free Mass Index and height-normalized FFMI from weight, height, and body fat percentage, and see how it compares to the documented natural (non-steroid) ceiling of 25.Mon, 24 Aug 2026 00:00:00 GMTHealthhttps://calcbadger.com/age-difference-calculator/https://calcbadger.com/age-difference-calculator/Find the exact age gap between two people from their birth dates, in years/months/days and as a percentage of the older person's age, plus the "half your age plus seven" reference rule.Sun, 23 Aug 2026 00:00:00 GMTDate & Timehttps://calcbadger.com/wacc-calculator/https://calcbadger.com/wacc-calculator/Calculate a company's weighted average cost of capital from its equity and debt weights, cost of equity (CAPM or a direct rate), and after-tax cost of debt.Sun, 23 Aug 2026 00:00:00 GMTFinancehttps://calcbadger.com/pool-calculator/https://calcbadger.com/pool-calculator/Find your pool's volume in gallons from its shape and dimensions, or work out how much salt to add to reach a saltwater chlorine generator's target level.Sat, 22 Aug 2026 00:00:00 GMTHome Improvementhttps://calcbadger.com/pizza-calculator/https://calcbadger.com/pizza-calculator/Work out how many pizzas to order for a group of adults and kids, by appetite and pizza size, plus a slices-per-size reference chart and the reverse question: how many people one pizza feeds.Sat, 22 Aug 2026 00:00:00 GMTFood & Drinkhttps://calcbadger.com/wingdings-translator/https://calcbadger.com/wingdings-translator/Convert text to Wingdings two different ways: a Unicode symbol preview that renders on any device, and the real Windows font code. Decode Wingdings-style text back into plain words too.Fri, 21 Aug 2026 00:00:00 GMTText Toolshttps://calcbadger.com/click-speed-test/https://calcbadger.com/click-speed-test/Measure your clicks per second (CPS) and clicks per minute over a timer you choose, then compare your result against the clinical single-finger tapping range from neuropsychology research.Fri, 21 Aug 2026 00:00:00 GMTGameshttps://calcbadger.com/prorated-rent-calculator/https://calcbadger.com/prorated-rent-calculator/Work out the partial-month rent for a mid-month move-in or move-out, and compare what the three common day-count methods (actual days in the month, a flat 30-day "banker's month," and the rent divided across a 365-day year) would each charge for the same dates.Thu, 20 Aug 2026 00:00:00 GMTReal Estatehttps://calcbadger.com/conduit-fill-calculator/https://calcbadger.com/conduit-fill-calculator/Check whether a set of THHN/THWN-2 conductors fits inside an EMT, IMC, RMC, or PVC conduit under the NEC Chapter 9 fill limits, and see the smallest size that would pass if it does not.Thu, 20 Aug 2026 00:00:00 GMTConstructionhttps://calcbadger.com/rounding-calculator/https://calcbadger.com/rounding-calculator/Round any number to a chosen number of decimal places or significant figures, with a choice of seven rounding methods including banker's rounding, and no binary floating-point rounding errors.Thu, 20 Aug 2026 00:00:00 GMTMathhttps://calcbadger.com/keg-calculator/https://calcbadger.com/keg-calculator/Work out how many 12 oz beers, US pints, or custom pours a keg holds for any standard US or metric keg size, plus how many kegs a party needs, using the federally defined keg sizes and standard-drink serving reference.Wed, 19 Aug 2026 00:00:00 GMTFood & Drinkhttps://calcbadger.com/sentence-counter/https://calcbadger.com/sentence-counter/Count sentences, words, and characters in text, plus reading time and Flesch readability scores, using Flesch's 1948 formula, its 1975 grade-level version, and Brysbaert's 2019 research.Wed, 19 Aug 2026 00:00:00 GMTText Toolshttps://calcbadger.com/markup-calculator/https://calcbadger.com/markup-calculator/Solve for selling price, cost, or markup percentage from the other two, and see the corresponding margin percentage every time, since the two are easy to mix up but never equal.Wed, 19 Aug 2026 00:00:00 GMTFinancehttps://calcbadger.com/topsoil-calculator/https://calcbadger.com/topsoil-calculator/Work out cubic yards, weight, and bag count for a lawn, garden bed, or raised bed from its shape, area, and fill depth, with soil-texture density presets sourced from USDA soil science.Tue, 18 Aug 2026 00:00:00 GMTConstructionhttps://calcbadger.com/asphalt-calculator/https://calcbadger.com/asphalt-calculator/Estimate tons of hot mix or recycled asphalt for a driveway, lot, or base repair from paved area and compacted depth, with an optional material cost estimate.Mon, 17 Aug 2026 00:00:00 GMTConstructionhttps://calcbadger.com/body-surface-area-calculator/https://calcbadger.com/body-surface-area-calculator/Calculate body surface area from height and weight using the Mosteller or Du Bois formula, in US or metric units, with both results shown side by side.Mon, 17 Aug 2026 00:00:00 GMTHealthhttps://calcbadger.com/board-foot-calculator/https://calcbadger.com/board-foot-calculator/Work out board feet for lumber from actual thickness, width, and length, with a rough-sawn quarter-thickness shortcut, waste allowance, and cost estimate.Thu, 13 Aug 2026 00:00:00 GMTConstructionhttps://calcbadger.com/shape-volume-calculator/https://calcbadger.com/shape-volume-calculator/Find the volume and surface area of a rectangular prism, cylinder, sphere, or cone. Enter the dimensions in ft, in, yd, m, or cm and get both numbers at once.Wed, 12 Aug 2026 00:00:00 GMTMathhttps://calcbadger.com/steps-to-miles-calculator/https://calcbadger.com/steps-to-miles-calculator/Convert steps to miles or kilometers using a stride length estimated from your height and gender, not a flat 2,000-steps-per-mile guess. Also converts a distance back into steps.Wed, 12 Aug 2026 00:00:00 GMTHealthhttps://calcbadger.com/fraction-calculator/https://calcbadger.com/fraction-calculator/Add, subtract, multiply, or divide two fractions (including mixed numbers), simplify a fraction to lowest terms, or convert between mixed numbers, improper fractions, decimals, and percents.Tue, 11 Aug 2026 00:00:00 GMTMathhttps://calcbadger.com/time-duration-calculator/https://calcbadger.com/time-duration-calculator/Find the elapsed time between two clock times, add or subtract hours and minutes from a time, or calculate the duration between two full dates and times, with automatic overnight rollover.Tue, 11 Aug 2026 00:00:00 GMTDate & Timehttps://calcbadger.com/tip-calculator/https://calcbadger.com/tip-calculator/Work out the tip and per-person total on a restaurant bill, with a toggle for tipping on the pre-tax subtotal vs. the tax-inclusive total and an even split across the table.Mon, 10 Aug 2026 00:00:00 GMTFinancehttps://calcbadger.com/gpa-calculator/https://calcbadger.com/gpa-calculator/Calculate your unweighted or weighted GPA from letter grades and credit hours, using the standard 4.0-scale grade-point chart and the common Honors/AP weighting convention.Mon, 10 Aug 2026 00:00:00 GMTEducationhttps://calcbadger.com/reaction-time-test/https://calcbadger.com/reaction-time-test/Test your simple reaction time over several trials, then compare your average, best, median, and consistency against reaction-time figures from published research.Mon, 10 Aug 2026 00:00:00 GMTGameshttps://calcbadger.com/calorie-calculator/https://calcbadger.com/calorie-calculator/Find your BMR, maintenance calories (TDEE), and a daily calorie target to lose, maintain, or gain weight, using the Mifflin-St Jeor equation.Sun, 09 Aug 2026 00:00:00 GMTHealthhttps://calcbadger.com/world-clock/https://calcbadger.com/world-clock/See the current time in dozens of cities worldwide, or convert a specific date and time from one time zone to another, including the day-of-week shift and daylight-saving status.Sun, 09 Aug 2026 00:00:00 GMTDate & Timehttps://calcbadger.com/percentage-calculator/https://calcbadger.com/percentage-calculator/Find a percentage of a number, calculate percentage increase or decrease, apply a discount, or compare two values with percent difference.Thu, 06 Aug 2026 00:00:00 GMTMathhttps://calcbadger.com/volume-converter/https://calcbadger.com/volume-converter/Convert between teaspoons, tablespoons, fluid ounces, cups, pints, quarts, gallons, milliliters, and liters, plus kitchen and bottle-size reference tables.Thu, 06 Aug 2026 00:00:00 GMTConversionhttps://calcbadger.com/date-calculator/https://calcbadger.com/date-calculator/Find the number of days between two dates, add or subtract days from a date, or count down to New Year's Day, Halloween, Thanksgiving, and Christmas.Thu, 06 Aug 2026 00:00:00 GMTDate & Timehttps://calcbadger.com/mortgage-calculator/https://calcbadger.com/mortgage-calculator/Estimate your monthly mortgage payment (principal, interest, taxes, insurance, PMI, HOA) and total interest, for any home price, down payment or rate.Wed, 05 Aug 2026 00:00:00 GMTFinancehttps://calcbadger.com/time-converter/https://calcbadger.com/time-converter/Convert between seconds, minutes, hours, days, weeks, months, and years instantly, with reference tables and worked examples for ages, projects, and countdowns.Wed, 05 Aug 2026 00:00:00 GMTConversionhttps://calcbadger.com/concrete-calculator/https://calcbadger.com/concrete-calculator/Calculate how much concrete a slab, footing, wall, column, or post hole needs in cubic feet and cubic yards, plus how many 40, 50, 60, or 80 lb bags to buy.Wed, 05 Aug 2026 00:00:00 GMTConstructionhttps://calcbadger.com/temperature-converter/https://calcbadger.com/temperature-converter/Convert between Celsius, Fahrenheit, and Kelvin instantly, with reference tables for oven temperatures, fever/body-temperature readings, and everyday weather values.Tue, 04 Aug 2026 00:00:00 GMTSciencehttps://calcbadger.com/length-converter/https://calcbadger.com/length-converter/Convert millimeters, centimeters, meters, kilometers, inches, feet, yards, and miles, with reference tables for heights, tool sizes, and race distances.Tue, 04 Aug 2026 00:00:00 GMTConversionhttps://calcbadger.com/weight-converter/https://calcbadger.com/weight-converter/Convert between micrograms, milligrams, grams, kilograms, ounces, pounds, stone, and US tons instantly, with reference tables for body weight, cooking, and dosing.Tue, 04 Aug 2026 00:00:00 GMTConversionhttps://calcbadger.com/coin-flip-simulator/https://calcbadger.com/coin-flip-simulator/Flip 1-500 virtual coins (fair or weighted) and see the heads/tails split and longest streak, or use the probability calculator for exact binomial odds.Mon, 03 Aug 2026 00:00:00 GMTGameshttps://calcbadger.com/cd-calculator/https://calcbadger.com/cd-calculator/Work out what a certificate of deposit will be worth at maturity: final balance, total interest, and the effective APY for any rate, compounding schedule, and term.Sun, 02 Aug 2026 00:00:00 GMTFinancehttps://calcbadger.com/square-footage-calculator/https://calcbadger.com/square-footage-calculator/Calculate the square footage of a room or area from its measurements, with conversions to square meters, square yards, and acres, plus a cost estimate.Sun, 02 Aug 2026 00:00:00 GMTHome Improvementhttps://calcbadger.com/stair-calculator/https://calcbadger.com/stair-calculator/Calculate stair layout from total rise: riser count, riser height in carpenter fractions, tread run, stringer length, and angle — checked against IRC limits.Sun, 02 Aug 2026 00:00:00 GMTConstructionhttps://calcbadger.com/sat-score-calculator/https://calcbadger.com/sat-score-calculator/Convert raw scores on a paper SAT practice test into scaled section scores and a 400–1600 total, using College Board’s official conversion table for Practice Test #4.Sun, 02 Aug 2026 00:00:00 GMTEducationhttps://calcbadger.com/molarity-calculator/https://calcbadger.com/molarity-calculator/Convert between mass, molar mass, and volume to solve for molarity, grams of solute, solution volume, or molar mass, with compound values built in.Sun, 02 Aug 2026 00:00:00 GMTSciencehttps://calcbadger.com/bmi-calculator/https://calcbadger.com/bmi-calculator/Calculate BMI from weight and height in US or metric units, see your CDC/WHO category and healthy-weight range, plus an optional Asian-population cutoff.Sun, 02 Aug 2026 00:00:00 GMTHealth