Paycheck & take-home

• Paycheck Calculator Estimate your paycheck and take-home pay after federal, state, and FICA taxes.

Loans & debt

• Mortgage Calculator Calculate your monthly mortgage payment including taxes, insurance, PMI, and HOA fees.
• Loan Calculator Calculate your monthly loan payment, total interest, and payoff time with extra payments.

Savings & investing

• Compound Interest Calculator Calculate compound interest and compare annual, monthly, daily, and continuous compounding frequencies.

Tax, prices & value

• Sales Tax Calculator Calculate the sales tax amount and total price, or back into the pre-tax price from a tax-inclusive total.

Body composition

• BMI Calculator Calculate your Body Mass Index and weight category.

Calories & nutrition

• Calorie Calculator Find how many calories to eat per day to lose, maintain, or gain weight, based on your BMR, TDEE, and goal.
• TDEE Calculator Calculate your BMR, TDEE, and daily macros for cutting, maintaining, or bulking.

Sleep & pregnancy

• Pregnancy Due Date Calculator Estimate your due date and key pregnancy milestones from your last period or conception date.
• Sleep Cycle Calculator Find your ideal bedtime or wake-up time based on 90-minute sleep cycles.

Time & dates

• Age Calculator Calculate exact age in years, months, and days from any birth date.
• Date Calculator Find the years, months, and days between two dates, or add and subtract days, weeks, months, and years — with US, EU, and ISO date formats and ISO week numbers.

Money & shopping

• Tip Calculator Calculate tip amount, total bill, and per-person split.
• Percent Off Calculator Calculate your discount amount and final sale price, including stacked discounts.

Home & hobby

• Gas Mileage (MPG) Calculator Work out your car's real fuel economy in MPG, L/100km, and gallons per 100 miles, averaged across as many fill-ups as you log.

Percentages

• Percentage Calculator Solve the three classic percentage questions: what is X% of Y, X is what percent of Y, and the percentage increase or decrease between two numbers.
• Percentage Change Calculator Percentage increase and decrease with negative values handled correctly, percent vs. percentage points, and multi-period trends.

Area & materials

• Area Calculator Calculate the area of a rectangle, square, triangle, circle, trapezoid, parallelogram, or ellipse in any unit.
• Tile Calculator Find out how many tiles and boxes you need for any room.
• Square Footage / Flooring Cost Calculator Calculate total square footage, boxes, and cost across multiple rooms in one project.

Pool & water

• Pool Volume Calculator Calculate your pool volume in gallons, liters, and cubic feet from its dimensions.
• Pool Chemical Calculator Get exact doses for chlorine, shock, pH, and alkalinity.

Yard & materials

• Lawn Fertilizer Calculator Get the exact amount of fertilizer, bags, and cost for your lawn based on grass type and N-P-K ratio.
• Gravel Calculator Calculate how much gravel you need in cubic yards and tons for pea gravel, crushed stone, river rock, and more — with a compaction buffer, editable density, and cost.

Home projects

• Paint Calculator Work out how many gallons a room needs, with doors and windows subtracted, coats multiplied, and texture accounted for.