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All PureCalculate calculators
Free online calculators for money, math, dates, health and everyday decisions. Each one shows its formula and a worked example, and the money calculators have US and UK versions.
Seller calculators
For Etsy and Amazon sellers who want to know what they really keep.
Etsy Profit Calculator
Net profit, margin and break-even price after every Etsy fee. US and UK shops.
Amazon FBA Profit Calculator
Profit per unit, margin and ROI after referral fees, FBA fulfillment, storage and ads.
Creator & freelancer calculators
For YouTubers, freelancers and anyone paid by the hour or the view.
YouTube Revenue Calculator
Daily, monthly and yearly earnings from views, niche CPM and sponsorships.
Freelancer Hourly Rate Calculator
The minimum rate to charge after taxes, business costs, time off and unbilled hours.
Overtime Pay Calculator
Work out time-and-a-half or double-time pay from your hourly rate or salary and hours worked.
Salary to Hourly Calculator
Convert salary to an hourly rate or hourly pay to a yearly salary.
Time and a Half Calculator
Find your time and a half rate and overtime pay.
Investing calculators
For investors tracking returns, fees and tax.
Crypto Profit & Loss Calculator
Profit or loss after exchange fees and tax, with ROI and break-even sell price.
RD Calculator
Maturity value and interest on a recurring deposit, compounded quarterly.
FD Calculator
Fixed deposit maturity, interest and effective yield for any compounding.
SIP Calculator
Future value of a monthly SIP with step-up, lump sum and inflation.
Compound Interest Calculator
Growth with daily to yearly compounding and monthly deposits.
Loan EMI Calculator
Monthly EMI, total interest and balance for any loan.
Mortgage Calculator
Monthly payment with taxes, insurance, PMI and extra payments.
Credit Card Payoff Calculator
Debt-free date, interest cost and the payment you need.
Sales Tax Calculator
Add sales tax to a price, remove it from a total or find the tax rate, with quantity and discount.
Auto Loan Calculator
Estimate your monthly car payment, total interest and savings from extra payments.
Lottery Tax Calculator
Compare the lump sum with the annuity after federal and state tax, with the break-even return.
401(k) Calculator
Project your retirement balance with employer match, raises, returns and inflation.
FHA Loan Calculator
Estimate your FHA monthly payment with upfront and annual mortgage insurance, tax and insurance.
VA Loan Calculator
See your VA loan payment with the funding fee, no down payment and no monthly PMI.
Home Affordability Calculator
Find the highest home price you can afford from your income, debts, down payment and rate.
Debt-to-Income Ratio Calculator
Check your DTI, your housing ratio and how much more debt you could take on.
Down Payment Calculator
See the cash needed for a home at any percentage and how long it takes to save it.
Rent vs Buy Calculator
Compare net worth from buying or renting and find your break-even year.
Refinance Calculator
New payment, monthly savings, break-even point and lifetime savings.
Simple Interest Calculator
Interest, principal, rate or time with I = P × r × t, in years, months or days.
Math calculators
Check homework, split fractions and summarize numbers, with the working shown.
LCM Calculator
Find the least common multiple of two or more numbers, with prime factors and steps.
GCD Calculator
Find the greatest common divisor (HCF) with Euclidean algorithm steps.
Average Calculator
Mean, median, mode, range and weighted average for any list of numbers.
Volume Calculator
Volume and surface area of a box, cylinder, sphere, cone and more, with liters and gallons.
Square Root Calculator
Square root, cube root and simplified radical form of any number.
Percentage Calculator
Percent of a number, percentage change, and increase or decrease by a percent.
Area Calculator
Area and perimeter of common shapes, with m², ft², acre and hectare results.
Upper and Lower Fence Calculator
Find Q1, Q3, IQR, fences and outliers for a data set.
Discount Calculator
Sale price, savings, real percent off, stacked deals and sales tax.
Grade Calculator
Weighted grade, letter grade and the score you need on your final.
Home & construction calculators
Estimate materials and sizes for building, landscaping and home projects.
Roof Pitch Calculator
Find roof pitch, angle, slope and rafter length.
Roofing Calculator
Estimate roof area, squares and shingle bundles.
Square Footage Calculator
Find area for rectangles, circles, triangles and L-shapes.
Concrete Calculator
Cubic yards and bags of concrete for slabs and posts.
Tile Calculator
How many tiles you need, with grout gap and waste.
Gravel Calculator
Tons and cubic yards of gravel for a driveway or path.
Mulch Calculator
Cubic yards and bags of mulch for garden beds.
Stair Calculator
Risers, treads, run and stringer length for stairs.
Floor Area Ratio Calculator
Find FAR, maximum floor area or lot size needed.
Date & time calculators
Work out how long something takes, how many days apart two dates are, or when a deadline lands.
Time Duration Calculator
Hours and minutes between two times or dates, with breaks and decimal hours.
Date Difference Calculator
Years, months, weeks and days between two dates, with weekdays and total hours.
Working Days Calculator
Business days between two dates, or add working days, with US and UK holidays.
Age Calculator: How Old Am I?
Exact age, birthday countdown, milestones and fun facts.
Day of Week Calculator
Weekday of any date, plus day of the year, ISO week and leap year check.
Add Days to Date Calculator
Add or subtract days, weeks, months and years to get the new date.
Days Until Calculator
Countdown in days, hours and minutes to any date and time.
Time to Decimal Calculator
Convert hours and minutes to decimal hours for payroll.
Time Card Calculator
Total weekly hours from start and end times, with overtime and pay.
Age Difference Calculator
Find the age gap between two people in years, months and days.
How Many Days Until Calculator
Count down to any holiday, season or date.
Days Until Christmas
Days, weeks, sleeps and hours to Christmas Day.
Days Until Halloween
Countdown to October 31 with the weekday for each year.
Days Until Thanksgiving
Countdown to the fourth Thursday of November.
Days Until Easter
Countdown to Easter Sunday, worked out by rule.
Days Until Summer
Count to the June solstice or to June 1.
Days Until Spring
Count to the March equinox or to March 1.
Health calculators
Plan your nutrition with simple, clear numbers. General information only, not medical advice.
Protein Intake Calculator
Daily protein in grams for your weight and goal, with a per-meal split.
BMI Calculator
Body mass index with WHO adult categories and a healthy weight range.
BMR Calculator
Basal metabolic rate and daily calorie needs by activity level.
Ideal Weight Calculator
Ideal weight from four classic formulas plus the healthy BMI range.
Steps to Miles Calculator
Convert steps to miles and kilometers from your height or step length.
Water Intake Calculator
How much water to drink a day from your weight, exercise and weather.
Macro Calculator
Daily calories and grams of protein, carbs and fat for your goal.
How Much Sleep Do I Need?
Hours of sleep for your age and bedtimes that fit your wake-up time.
Sleep Debt Calculator
See how much sleep you owe and how long it takes to repay.
ECG Heart Rate Calculator
Heart rate from an ECG with the 300, 1500 and 6-second methods.
Heart Rate Zones Calculator
Find your zone 2 range and all five heart rate zones.
TDEE Calculator
Daily calories you burn from your BMR and activity level.
Calorie Calculator
Calories a day to lose or gain weight at your pace, with a goal date.
Height Calculator
Predict a child's adult height from both parents' heights.
Coming next
Calculators we’re building now
Want one of these sooner, or something else entirely? Tell us through the contact page.
Uber & Lyft driver earnings
Real hourly pay after gas, mileage and platform fees.
DoorDash & Instacart earnings
What delivery work pays per hour and per mile.
Hourly to salary
Convert hourly pay to a yearly salary and back.
1099 quarterly tax
Estimated quarterly tax payments for US freelancers.