Calculators
Finance, health, date and everyday calculators that just work. All free on Super Simple Digital Tools, no signup required.
Calculators (102)
VAT CalculatorAdd or remove VAT from any amount instantly, in any currency.Loan CalculatorCalculate monthly repayments, total interest and a full amortization schedule.Compound Interest CalculatorSee how your money grows with compound interest and regular deposits.Ad Revenue CalculatorEstimate your website ad revenue from pageviews and RPM. Free, instant, no signup.Sleep CalculatorFind the best bedtime or wake-up time based on 90-minute sleep cycles. Free, instant, no signup.Money CounterCount your cash by entering the quantity of each US bill and coin denomination. Free, instant, no signup.Mortgage CalculatorCalculate your monthly mortgage payment, total interest, and full amortization schedule for any home loan. Free, instant, no signup.Amortization CalculatorGenerate a full year-by-year amortization schedule showing principal, interest, and remaining balance for any loan. Free, instant, no signup.Car Loan CalculatorWork out your monthly car loan payment, total interest, and total loan cost based on price, deposit, rate, and term. Free, instant, no signup.Simple Interest CalculatorCalculate simple interest and total amount using principal, annual rate, and time period. Free, instant, no signup.APY CalculatorConvert a nominal interest rate to Annual Percentage Yield (APY) for yearly, quarterly, monthly, or daily compounding. Free, instant, no signup.CAGR CalculatorCalculate the Compound Annual Growth Rate (CAGR) between a starting and ending value over any number of years. Free, instant, no signup.Future Value CalculatorProject the future value of a lump-sum investment given a present value, annual rate, and time horizon. Free, instant, no signup.Investment CalculatorProject the future value of an investment with an initial amount, regular monthly contributions, and compound growth. Free, instant, no signup.Savings CalculatorCalculate the final balance of a savings account with an initial deposit, regular monthly contributions, and interest. Free, instant, no signup.Savings Goal CalculatorFind out how much to save each month to reach a savings goal within a set number of years. Free, instant, no signup.Retirement CalculatorEstimate how much you'll have saved by retirement based on your age, current savings, monthly contributions, and return rate. Free, instant, no signup.SIP CalculatorCalculate the future value of a Systematic Investment Plan (SIP) with monthly investments at a given annual return. Free, instant, no signup.Daily Compound Interest CalculatorCalculate the final amount and interest earned when interest compounds daily over a set number of days. Free, instant, no signup.Forex Compounding CalculatorProject how a trading account grows when you compound a fixed percentage gain over multiple periods. Free, instant, no signup.Interest Rate CalculatorReverse-calculate the annual compound interest rate needed to grow an initial amount to a final amount over a given period. Free, instant, no signup.Loan Payoff CalculatorFind out how many months it will take to pay off a loan given the balance, interest rate, and monthly payment. Free, instant, no signup.Credit Card Repayment CalculatorCalculate how long it will take to clear your credit card balance and total interest paid at a given monthly payment. Free, instant, no signup.Margin CalculatorCalculate gross profit margin, markup percentage, and profit from cost and selling price. Free, instant, no signup.Mortgage Refinance CalculatorCompare your current and new mortgage rates to see your monthly saving and total saving over the remaining loan term. Free, instant, no signup.Price Per Square Foot CalculatorDivide a property's price by its area in square feet to instantly find the price per square foot. Free, instant, no signup.Stock Average CalculatorCalculate the average cost per share across two stock purchases with different quantities and prices. Free, instant, no signup.How Long Will Money Last CalculatorFind out how many years your savings will last given a monthly withdrawal amount and investment return rate. Free, instant, no signup.IRR CalculatorEstimate the Internal Rate of Return (IRR) for an investment with equal annual cash flows using bisection. Free, instant, no signup.Cash Back CalculatorCalculate how much cash back you earn on a purchase and your effective net spend after the rebate. Free, instant, no signup.Hourly to Salary CalculatorConvert an hourly wage to an annual salary, monthly pay, and weekly pay based on your hours and weeks worked. Free, instant, no signup.Salary to Hourly CalculatorConvert an annual salary to an equivalent hourly rate, plus monthly and weekly pay figures. Free, instant, no signup.Overtime CalculatorCalculate overtime pay and the overtime hourly rate from your base rate, overtime hours, and multiplier. Free, instant, no signup.Pay Raise CalculatorCalculate your new salary and raise amount after a percentage pay increase, plus the monthly uplift. Free, instant, no signup.Time and a Half CalculatorFind your time-and-a-half hourly rate (1.5×) and total pay for any number of hours worked. Free, instant, no signup.Square Footage CalculatorCalculate square footage of a rectangular area and see it converted to square meters and square yards. Free, instant, no signup.Cubic Feet CalculatorCalculate the volume of a box or space in cubic feet, cubic yards, and cubic meters from length, width, and height. Free, instant, no signup.Cubic Yards CalculatorCalculate cubic yards of material needed for a rectangular area given length, width, and depth in inches. Free, instant, no signup.CBM CalculatorCalculate total cubic metres (CBM) for shipping and freight from item dimensions and quantity. Free, instant, no signup.Flooring CalculatorEstimate the area and total material cost of flooring for a rectangular room. Free, instant, no signup.Asphalt CalculatorCalculate the weight of asphalt (tons and pounds) needed for a driveway or road from area and depth. Free, instant, no signup.Gravel CalculatorEstimate cubic yards and tons of gravel needed for a rectangular area at a given depth. Free, instant, no signup.Mulch CalculatorCalculate how many cubic yards of mulch you need and how many 2 cu ft bags to buy for a garden bed. Free, instant, no signup.Electricity Cost CalculatorEstimate the running cost of any appliance — pick a typical appliance or enter its wattage, set how long it runs, and get daily, monthly and yearly cost. Free, instant, no signup.Voltage Drop CalculatorCalculate voltage drop, drop percentage and voltage at the load for copper or aluminium wire by gauge, current, phase and run length. Free, instant, no signup.Resistor Color Code CalculatorDecode a 4-band or 5-band resistor from its colour bands into resistance, tolerance and the min/max value range. Free, instant, no signup.Ohm's Law CalculatorSolve Ohm's law — enter any two of voltage, current and resistance to find the third, plus power. Free, instant, no signup.LED Savings CalculatorCalculate your annual and 10-year energy savings when switching from incandescent or CFL bulbs to LED. Free, instant, no signup.Miles per kWh CalculatorCalculate an electric vehicle's miles per kWh efficiency and kWh consumption per 100 miles. Free, instant, no signup.MPGe CalculatorConvert an EV's miles-per-kWh efficiency to Miles Per Gallon equivalent (MPGe) using the EPA standard. Free, instant, no signup.Age CalculatorCalculate your exact age in years, months, and days from your date of birth. Free, instant, no signup.Age Difference CalculatorFind the exact age difference between two people or two dates in years, months, and days. Free, instant, no signup.Chronological Age CalculatorCalculate exact chronological age at any reference date — useful for medical and developmental assessments. Free, instant, no signup.Date CalculatorAdd or subtract days from any date to find the resulting date and day of the week. Free, instant, no signup.Days Between Dates CalculatorCount the exact number of days, weeks, months, and years between any two dates. Free, instant, no signup.Days From Today CalculatorFind the exact date that falls a given number of days in the future or past from today. Free, instant, no signup.Days Until CalculatorFind out how many days until any upcoming date — a birthday, holiday, deadline, or event. Free, instant, no signup.Generation CalculatorEnter a birth year to find out which generation you belong to — Boomer, Gen X, Millennial, Gen Z, or Alpha. Free, instant, no signup.Birthday CalculatorFind the date of your next birthday, how many days away it is, and what age you will be turning. Free, instant, no signup.Pregnancy CalculatorEstimate your due date, current week of pregnancy, and trimester from your last menstrual period. Free, instant, no signup.Sobriety CalculatorTrack how many days, months, and years you have been sober from your sobriety start date. Free, instant, no signup.Final Grade CalculatorCalculate the score you need on your final exam to achieve your desired course grade. Free, instant, no signup.University Grade CalculatorCalculate your weighted university grade from up to three assessment components and their percentage weights. Free, instant, no signup.Percentage CalculatorCalculate percentages three ways: find X% of a number, find what percent X is of Y, or find the percent change between two values. Free, instant, no signup.Percentage Change CalculatorCalculate the percentage increase or decrease between two values, plus the raw difference. Free, instant, no signup.Decimal to Fraction CalculatorConvert any decimal number to its exact reduced fraction — including mixed numbers and improper fractions. Free, instant, no signup.Fractions CalculatorAdd, subtract, multiply, or divide any two fractions and get the answer as a reduced fraction and decimal. Free, instant, no signup.Density CalculatorCalculate the density of any substance from its mass and volume, with unit conversion for g, kg, lb, ml, L, and m³. Free, instant, no signup.BMI CalculatorCalculate your Body Mass Index (BMI) in metric or imperial units and see whether you're underweight, normal, overweight, or obese. Free, instant, no signup.BMR CalculatorCalculate your Basal Metabolic Rate (BMR) and estimated daily calorie needs at different activity levels using the Mifflin-St Jeor equation. Free, instant, no signup.Waist to Hip Ratio CalculatorCalculate your waist-to-hip ratio and assess your cardiovascular health risk as low, moderate, or high. Free, instant, no signup.Miles to Steps CalculatorConvert miles to steps using the average of 2,112 steps per mile, and see the equivalent distance in kilometres. Free, instant, no signup.Steps to Miles CalculatorConvert steps to miles and kilometres instantly — great for tracking your daily walking goal. Free, instant, no signup.Steps to Km CalculatorConvert steps to kilometres (and miles) using the standard step-length approximation of ~0.762 m per step. Free, instant, no signup.Steps to Calories CalculatorEstimate the calories burned from a step count based on your body weight — instant results, no account needed. Free, instant, no signup.How Many Steps in a Mile CalculatorFind out how many steps are in a mile based on your height and whether you're walking or running. Free, instant, no signup.How Long to Walk a Mile CalculatorFind out how long it takes to walk a mile at your chosen pace in minutes per mile and minutes per kilometre. Free, instant, no signup.Scientific CalculatorA full scientific calculator in your browser — trig, logarithms, roots, and more. Free, no signup.Calorie CalculatorEstimate the daily calories you need to maintain, lose, or gain weight based on the Mifflin-St Jeor equation. Free, instant, no signup.TDEE CalculatorCalculate your Total Daily Energy Expenditure — the calories you burn each day including activity. Free, instant, no signup.Body Fat CalculatorEstimate your body fat percentage using the U.S. Navy circumference method. Free, instant, no signup.Army Body Fat CalculatorEstimate body fat percentage and check it against the U.S. Army AR 600-9 standard for your age and sex. Free, instant, no signup.Ideal Weight CalculatorFind your ideal body weight using the Devine, Robinson, Miller and Hamwi formulas plus the healthy BMI range. Free, instant, no signup.Lean Body Mass CalculatorCalculate your lean body mass and body fat mass using the Boer formula. Free, instant, no signup.Healthy Weight CalculatorFind your healthy weight range for your height based on a BMI of 18.5–25. Free, instant, no signup.Calories Burned CalculatorEstimate the calories you burn during exercise from the activity, your weight and the duration. Free, instant, no signup.One Rep Max CalculatorEstimate your one-rep max (1RM) from a lighter set and get a full percentage-of-1RM training table. Free, instant, no signup.Target Heart Rate CalculatorFind your target heart rate training zones for fat burn and cardio using the Karvonen method. Free, instant, no signup.Macro CalculatorCalculate your daily calories and protein, carbohydrate and fat macros for your goal. Free, instant, no signup.Protein CalculatorWork out how much protein you need each day based on your weight and activity level. Free, instant, no signup.Carbohydrate CalculatorEstimate your recommended daily carbohydrate intake from your calorie needs. Free, instant, no signup.Fat Intake CalculatorEstimate your recommended daily fat intake in grams from your calorie needs. Free, instant, no signup.GFR CalculatorEstimate your glomerular filtration rate (eGFR) and chronic kidney disease stage using the MDRD equation. Free, instant, no signup.Body Surface Area CalculatorCalculate body surface area (BSA) using the Du Bois and Mosteller formulas. Free, instant, no signup.BAC CalculatorEstimate your blood alcohol content (BAC) from drinks, body weight and time using the Widmark formula. Free, instant, no signup.Due Date CalculatorEstimate your pregnancy due date and current gestational age from your last menstrual period. Free, instant, no signup.Pregnancy Conception CalculatorEstimate your conception date and last menstrual period from your due date. Free, instant, no signup.Ovulation CalculatorFind your most fertile days and estimated ovulation date from your last period and cycle length. Free, instant, no signup.Conception CalculatorEstimate your most likely conception window and due date from your last menstrual period. Free, instant, no signup.Period CalculatorPredict your upcoming period dates from your last period, cycle length and period length. Free, instant, no signup.Pregnancy Weight Gain CalculatorSee your recommended pregnancy weight gain range based on your pre-pregnancy BMI and current week. Free, instant, no signup.Body Type CalculatorFind your body shape — hourglass, pear, inverted triangle or rectangle — from your bust, waist and hip measurements. Free, instant, no signup.