All Calculators

Estimate cubic yards, tons, and bags of gravel for any project.

Figure out how many boxes of laminate, vinyl, or hardwood flooring to buy.

Estimate tile, boxes, mortar, and spacers for a floor, wall, or shower.

Work out gallons, coats, and estimated cost for any room.

Estimate roofing bundles, squares, screws, and cost from your roof pitch.

Calculate square footage for any room, convert units, and split rent fairly.

Calculate how much concrete you need for a slab or fence posts.

Estimate cubic yards and bags of mulch, topsoil, or compost for rectangular and round beds.

Calculate a tip and split the bill fairly among any number of people.

Calculate the true APR of a loan, car loan, or credit card — including fees.

Work out the return on an investment, rental property, or marketing spend.

Calculate a sale price, stack multiple discounts, and factor in sales tax.

Add sales tax to a price or remove it from a total, including VAT and GST-inclusive prices.

Find profit margin and markup from cost and price, or price for a target margin.

Monthly house payment with property tax, insurance, PMI and HOA, plus extra payments.

Monthly payment, total interest and payoff date for auto, personal and student loans.

See how savings grow with compound interest and monthly deposits.

Project your 401(k) and retirement savings and the income they could provide.

Estimate take-home pay after federal, state and FICA taxes and 401(k) deductions.

Estimate your US federal income tax, tax bracket and refund for 2026.

Track pregnancy week by week from your due date or last period.

Calculate your basal metabolic rate using the Mifflin-St Jeor formula.

Calculate your daily calorie needs to maintain, lose, or gain weight.

Estimate body fat percentage using the US Navy tape-measure method.

Calculate your daily protein target based on goal and activity level.

Get daily grams of protein, carbs, and fat for your calorie goal and diet style.

Estimate your ovulation date, fertile window, and next periods from your cycle.

Calculate your body mass index and find the healthy weight range for your height.

Find your total daily energy expenditure at every activity level, with loss and gain targets.

Add, subtract, multiply, or divide fractions, and convert decimals to fractions.

A full scientific calculator with trig, logs, exponents, and memory.

Calculate mean, variance, and sample or population standard deviation.

Calculate the probability of single, combined, and conditional events.

Find out what score you need on your final, or calculate a weighted average.

Calculate your GPA — weighted and unweighted, with cumulative terms rolled in.

Calculate percentages, percentage change, and add or subtract a percentage.

Find the mean, median, mode, and range of a list of numbers, plus weighted averages.

Pick random numbers in any range, draw names from a list, roll dice, or flip a coin.

Calculate your exact age, convert dog years, or find your retirement age.

Estimate your due date, conception date, and how far along you are.

Count days, weeks and business days between dates, or add and subtract days, months and years.

Add up hours worked, overnight shifts and breaks, or total a weekly time card with overtime pay.