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Popular calculators View all (471)
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Loan Payment Calculator
Monthly payment, total cost, and interest.
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Compound Interest Calculator
See how savings grow with monthly compounding.
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BMI Calculator
Body mass index from weight and height.
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Percentage Calculator
Find X percent of any number.
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Temperature Converter
Celsius, Fahrenheit, and Kelvin at once.
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Tip Calculator
Split the bill and tip between friends.
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Mortgage Calculator
Monthly mortgage payment from price, down payment, and rate.
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Calorie Calculator
Daily calories to maintain, lose, or gain weight.
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Heart Rate Zones Calculator
Training heart rate zones using the Karvonen method.
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Fuel Economy Calculator
Fuel consumption in L/100 km, km/L, and miles per gallon.
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GPA Calculator
Weighted GPA from grade points and credits.
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Markup Calculator
Selling price, profit, and margin from cost and markup.
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Finance 31 toolsPlan mortgages, forecast compound growth, calculate tax liabilities, and optimize your monthly budget with fast, accurate financial models.e.g. Loan Payment, Compound Interest, Mortgage, Simple InterestHealth 18 toolsTrack BMI, basal metabolic rate, daily hydration targets, and vital health screening indicators right from your browser with zero data shared.e.g. BMI, Calorie, BMR, Water IntakeMath 26 toolsSolve percentages, proportions, circle geometry, statistics, and algebraic formulas with instant formulas and step-by-step clarity.e.g. Percentage, Percentage Change, Average, Pythagorean TheoremConversion 18 toolsSwitch seamlessly between metric and imperial systems for temperature, length, volume, speed, digital data storage, and weights.e.g. Temperature, Length, Weight, Speed Converter (All Units at Once)Everyday 21 toolsHandy tools for daily decisions—calculate exact ages, split restaurant bills, count down important dates, and estimate tips effortlessly.e.g. Tip, Split Bill, Age, Days Between DatesEducation 11 toolsCalculate cumulative GPA, weighted course grades, required final exam scores, and weekly study schedules to stay ahead in school.e.g. GPA, Final Grade, Test Score Percentage, Reading TimeConstruction 14 toolsEstimate concrete yardage, paint coverage, tile quantities, drywall sheets, and lumber requirements for DIY projects and job sites.e.g. Paint, Concrete, Tile, FlooringBusiness 16 toolsCalculate gross margin, pricing markups, sales commissions, break-even thresholds, and payback periods to scale your business.e.g. Markup, Commission, Invoice Total, Payback PeriodScience 18 toolsSolve fundamental physics laws, kinetic energy, velocity, gas laws, and molar mass equations with complete formula breakdowns.e.g. Ohm's Law, Kinetic Energy, Density, Free FallCooking 13 toolsResize recipes for any serving count, convert cups to grams, estimate roast cooking times, and bake with exact culinary proportions.e.g. Recipe Scaler, Cooking Measurement, Coffee Ratio, Oven TemperatureAutomotive 13 toolsEvaluate true vehicle ownership costs—auto loan monthly payments, fuel economy MPG, vehicle depreciation, and EV charge speeds.e.g. Fuel Economy, Car Loan, Car Depreciation, EV Charging CostFitness 14 toolsCalculate running splits, one-rep maximums, target heart rate zones, and daily protein targets to reach your fitness goals faster.e.g. Heart Rate Zones, Running Pace, One-Rep Max, Calories BurnedTechnology 14 toolsConvert binary and hexadecimal numbers, verify display aspect ratios, test password entropy, and estimate file download speeds.e.g. Download Time, Number Base, Aspect Ratio, Password StrengthTravel 9 toolsPlan vacations with confidence—estimate road trip fuel costs, calculate daily travel allowances, time zone offsets, and flight durations.e.g. Trip Budget, Currency Converter (Manual Rate), Road Trip Planner, Jet Lag RecoveryEnergy 30 toolsCalculate solar panel array output, battery backup runtime, appliance power bills, wire gauge sizes, and electrical load safely.e.g. Battery Runtime, LED Bulb Savings, Voltage Drop, Air Conditioner BTUGardening 10 toolsEstimate soil and mulch cubic yards, calculate planting distances, seed quantities, and optimize watering schedules for vibrant gardens.e.g. Raised Bed Soil, Plant Spacing, Lawn Seed, Fertilizer ApplicationPhotography 30 toolsCalculate hyperfocal distance, depth of field blur, sensor crop factors, video bitrate storage, and photography project pricing.e.g. Exposure Value (EV), Depth of Field, Hyperfocal Distance, Crop FactorPets 20 toolsCalculate daily feeding calories for dogs and cats, aquarium volume and filter turnover, horse hay requirements, and lifetime pet care costs.e.g. Dog Daily Calorie, Cat Daily Calorie, Pet Food Cost, Pet Weight Loss TimelineReal Estate 20 toolsAnalyze investment properties with capitalization rates, gross and net rental yield, closing costs, down payments, and seller proceeds.e.g. Rental Yield, Cap Rate, Cash-on-Cash Return, Rental Property Cash FlowMusic & Audio 18 toolsConvert BPM to delay times, find note frequencies and cents, add decibels, size an amplifier, estimate room reverb, and work out audio file sizes.e.g. BPM to Delay Time, Musical Note to Frequency, Frequency to Nearest Note and Cents, Song Length from BPM and BarsSewing & Crafts 15 toolsWork out curtain and quilt fabric, knitting cast-on counts, yarn skeins, candle wax, resin volume, bead strands, and picture mat sizes before you start a project.e.g. Curtain Fabric Yardage, Knitting Gauge and Cast-On, Yarn Skeins Needed, Quilt Squares and FabricHiking & Camping 15 toolsPlan a hike or camping trip with trail time estimates, pack weight checks, water and stove fuel needs, altitude and oxygen levels, wind chill, and last-light start times.e.g. Hiking Time Calculator (Naismith Rule), Backpack Weight Percentage, Hiking Water Needs, Camp Stove FuelAstronomy & Space 15 toolsWork out telescope magnification and resolving power, star brightness and distance, moon phases, sidereal time, orbital periods, rocket delta-v, and black hole size.e.g. Telescope Magnification and Exit Pupil, Telescope Light Grasp and Limiting Magnitude, Telescope Resolving Power, Star Magnitude Brightness RatioParenting & Baby 15 toolsEstimate baby formula and diaper needs, corrected age for premature babies, child height and sleep guides, pregnancy weight gain, childcare costs, and parental leave pay.e.g. Baby Formula Amount, Diaper Cost, Corrected Age Calculator for Premature Babies, Child Adult Height PredictorAviation & Flight 11 toolsWork out density altitude, crosswind and headwind components, true airspeed, wind correction, top of descent, fuel needs, weight and balance, glide distance, climb rate, cloud base, and turn performance.e.g. Density Altitude, Crosswind and Headwind Component, True Airspeed, Top of DescentBoating & Sailing 11 toolsWork out hull speed, anchor scope, tide height by the rule of twelfths, propeller slip, boat fuel range, sail area and displacement ratios, distance to the horizon, bridge clearance, and passage time with current.e.g. Hull Speed, Anchor Rode Length, Rule of Twelfths Tide, Propeller SlipFarming & Agriculture 11 toolsWork out seeding rates, grain bin capacity, feed conversion, pasture stocking rate, fertilizer cost per pound of nutrient, sprayer calibration, irrigation depth, grain moisture yield, egg production, field capacity, and livestock due dates.e.g. Seeding Rate, Grain Bin Capacity, Feed Conversion Ratio, Pasture Stocking RateWeddings & Events 11 toolsPlan a wedding or party with a budget split, bar drinks and appetizer quantities, round table seating, tablecloth sizes, centerpiece flowers, cake servings, RSVP headcount forecasts, invitation costs, shuttle buses, and planning deadlines.e.g. Wedding Budget Split, Event Bar Drinks, Appetizer Quantity, Round Table SeatingGaming & Esports 1 toolsWork out the real odds behind rare drops and loot: the chance of getting an item in a number of attempts, the average grind, and how many tries you need to be confident.e.g. Drop Rate ProbabilityFishing & Angling 1 toolsEstimate a catch's weight from length and girth so you can measure, record, and release it quickly, with simple formulas anglers already use on the water.e.g. Fish WeightWeather & Climate 1 toolsTurn temperature and humidity readings into numbers that explain the weather: dew point, how humid the air feels, and when moisture is likely to condense.e.g. Dew Point
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