All Tools

Calculate your body mass index (BMI) from weight and height in seconds, see your WHO weight category and the healthy weight range for your height.

Find your basal metabolic rate with the Mifflin-St Jeor equation — the calories your body burns at complete rest — from sex, age, weight and height.

Calculate your total daily energy expenditure (TDEE) from BMR and activity level, and see the calories to lose, maintain or gain weight.

Calculate the calories you need each day for your goal, from weight loss to maintenance to a controlled gain, with protein, fat and carb ranges.

Calculate your daily calories and macronutrient split — protein, fat and carbohydrates — from your body weight, activity level and goal.

Calculate how much water to drink each day based on your body weight and exercise time, shown in liters and 250 ml glasses.

Enter your wake-up time and age group to get suggested bedtimes and 90-minute sleep cycles, so you wake at the end of a cycle instead of mid-sleep.

Calculate your daily protein target in grams from body weight and activity level, with per-meal amounts for three and four meals a day.

Calculate a reference ideal body weight and the healthy BMI weight range for your height, in kilograms, using the Devine formula.

Calculate the tip and total on any bill and split it evenly between any number of people, with preset tip percentages from 10% to 25%.

Add sales tax to any price or back it out of a tax-inclusive total. Enter an amount and a rate to see the pre-tax price, the tax, and the total.

Calculate the money saved by any discount percentage and the price you pay, with optional sales tax on the reduced price for the true checkout total.

Estimate take-home pay per paycheck from an hourly wage or an annual salary, showing gross pay, FICA, simplified federal tax, state tax and net pay.

Split your monthly income into needs, wants and savings by percentage, with the 50/30/20 rule as the default starting point and the figures in dollars.

Work out how many months a credit card balance takes to clear, the total interest you will pay, and the payoff date — with optional extra monthly payments.

Plan focused work in 15, 25, or 50-minute blocks with short breaks, a progress ring, and a daily session count.

Track up to 12 habits on a Monday-to-Sunday grid with streaks and a weekly completion percentage.

Assemble a precise image prompt from subject, light, lens, medium and palette — then copy it with the settings to send alongside.

Build a music style prompt with a named dynamic arc, an exclude list and a bracketed lyric skeleton you can edit line by line.

Name a goal and count down to its deadline in days, hours, minutes, and seconds. Your target stays saved in this browser.

Draw from 40 original, clean truth and dare prompts, add player names, and revisit the latest picks.