Calculators

Find out how much sooner you'd pay off your car loan, and how much interest you'd save, by adding extra principal payments. Compare an extra monthly amount or a one-time lump sum against your standard schedule, and check whether your loan's financing type actually lets early payments save you anything.

Add your debts and a monthly budget to compare two payoff strategies side by side: the debt snowball (smallest balance first) and the debt avalanche (highest interest rate first). See months to debt-free, total interest paid, and the payoff order for each debt under both methods.

Find out how much sooner you'd pay off your mortgage, and how much interest you'd save, by adding extra principal payments. Compare extra monthly amounts, a one-time lump sum, or switching to biweekly payments against your standard schedule.

Add what you own and what you owe to see your net worth: total assets minus total liabilities. It also splits your assets into liquid (cash you could access within days) and illiquid (retirement accounts, your home, a vehicle) so you can see your liquid net worth alongside your overall one.

Figure out how much lumber you're actually buying. Enter a board's dimensions to get board feet per piece, total board feet for your order, and total cost if you know the price per board foot.

Figure out how much gravel to order for a driveway, path, or other area. Enter the area and depth to get the volume and, since gravel is sold by weight, the tonnage to give your supplier.

Figure out how much mulch to buy for your beds. Enter your bed dimensions and depth to get the volume, the number of standard bags, and an estimated delivery weight for bulk mulch.

Figure out how much paint to buy for a room. Enter your room dimensions (or a wall area you already know), the number of doors and windows, and how many coats you're planning, and get a purchasable amount, not just a raw number.

This estimates body fat percentage from a handful of tape-measure circumferences, using the method the U.S. Navy uses for body composition assessment. It needs a height, weight, neck, and waist measurement, plus a hip measurement for women. Measurement technique affects accuracy meaningfully, so read the instructions for each measurement before you start.

Estimate your one-rep max (1RM) from a weight and rep count you've actually lifted, using your choice of the Epley, Brzycki, or Lombardi formula. Get training weights at 95%, 90%, 85%, 80%, 75%, and 70% of that estimate.

Find how much protein you actually need each day. Enter your bodyweight, how active you are, and your goal, and get a daily range in grams, not a single number pretending to be more precise than the science actually is, plus a per-meal breakdown so you know how to spread it out.

Estimate your Total Daily Energy Expenditure (TDEE): the calories you burn in an average day, including exercise. Enter your stats below to get a BMR estimate and calorie targets for cutting, maintenance, and bulking.

Estimate how much fuel a trip will cost, in US or metric units. Enter a distance and your vehicle's fuel efficiency to get a cost, or work backward from a recent fill-up (distance driven and fuel used) to find your actual mpg or L/100km.

Find the percentage increase or decrease between two numbers, whatever they represent: a price, a population, a score, a measurement. Enter a starting value and a new value to get the change, clearly labeled as an increase or decrease.

Sleep happens in cycles of roughly 90 minutes, and waking up near the end of one tends to feel easier than being pulled out of deep sleep mid-cycle. Enter a wake-up time to get bedtime options, or a bedtime to get wake-up options, each timed to land on a full number of cycles.

Work out the tip, the total, and what each person owes. Enter the bill, pick a tip percentage, and add how many people are splitting it, if any.

Log clock-in and clock-out times for each day in your pay period, subtract unpaid breaks, and get total hours worked, both as decimal hours and hours:minutes, plus any overtime over 40 hours in a week and gross pay if you enter an hourly rate.