Calculators

Convert decimal numbers to hexadecimal strings.

Convert base-10 decimal numbers to base-2 binary.

Convert hexadecimal strings to decimal numbers.

Convert base-2 binary numbers to base-10 decimal.

Calculate exact age, total days lived, and next birthday countdown.

Convert between Degrees, Radians, and Gradians.

Scale widths and heights while preserving the same aspect ratio.

Estimate Blood Alcohol Content based on consumption.

A simple and clean calculator for everyday addition, subtraction, multiplication, and division.

Estimate body fat percentage using standard body measurements.

Estimate daily maintenance calories from age, size, sex, and activity level.

Estimate calories burned during various physical activities.

Convert between cups, grams, ounces, and other kitchen measurements.

Convert currencies with daily Frankfurter exchange rates or a manual fallback rate.

Measure date gaps, calculate D-Day, and add or subtract days, weeks, months, and years.

Calculate sale price, amount saved, and stacked discounts.

Calculate the final price after applying discounts and taxes.

Calculate what you need on your final exam to reach a target grade.

Estimate trip costs based on distance, fuel price, and efficiency.

Calculate your semester or cumulative GPA based on course grades.

Find your healthy weight range based on height and frame.

Calculate the value of money over time based on inflation rates.

Calculate return on investment and annual growth percentages.

Estimate monthly payment, total interest, and payoff totals for loans.

Calculate your ideal protein, carb, and fat intake.

Calculate profit margins and markups for business.

Calculate basic statistical values for a dataset.

Estimate your most fertile days and ovulation date.

Calculate percentage of a number, percentage change, and part-of-total values.

Estimate how much you need to save for a comfortable retirement.

Convert standard numbers to Roman numerals and vice versa.

Calculate pace, time, or distance for your runs.

Estimate annual, monthly, weekly, and hourly pay from work inputs.

Calculate tax amount, final total, or pre-tax price.

Calculate total price including sales tax.

Calculate the monthly savings needed to reach a specific financial goal.

Perform advanced mathematical functions like trigonometry and logarithms.

Estimate how many minutes it will take to read your text aloud.

Calculate mean, median, mode, standard deviation, and variance.

Estimate monthly payments and total interest for student loans.

Simple digital clicker for counting people, inventory, or events.

Calculate elapsed time between two dates and times.

Check the time difference and schedule between multiple global cities.

Calculate tips, split bills, tax, and per-person totals.

Convert common length, weight, temperature, and volume units.

Calculate Value Added Tax for international purchases.

Estimate how much water you should drink daily.

Calculate total work hours for your timesheet, including breaks.

Calculate your Basal Metabolic Rate to understand daily calorie needs.

Compare the price per weight/volume to find the best deal.

Find the aspect ratio for custom video or screen dimensions.

Tap along to any song to find its Beats Per Minute (BPM).

Calculate the difference between estimated and actual values.

Estimate growth from principal, interest rate, time, and monthly contributions.

Verify if a number is prime and find the next available prime number.

See how long it will take to pay off your credit card balance.

Quickly check if any year is a leap year.

Analyze if refinancing your mortgage will save you money over time.

Estimate body fat using Navy and BMI methods.

Calculate BMI with metric or US units and show the standard category.

Estimate your baby's arrival based on Last Period or Conception.

Estimate words per minute based on character count and time.

Calculate the tip and split the total bill among friends.

Calculate the percentage change between two values.

Scale screen resolutions (4K, 1080p) while keeping aspect ratio.