Calculators tools

Find exact years, months and days between any two dates — plus your next birthday.

Calculate body mass index in metric or imperial, with category and a healthy weight range.

Work out X% of a number, what percent one number is of another, and percent increase or decrease.

Estimate your monthly loan payment, total interest and full amortisation for any loan amount, rate and term.

Add a tip to any bill and split it evenly between any number of people in seconds.

See the final sale price and how much you save from a percentage discount, plus stacked discounts.

Find the exact days, weeks, months and years between two dates — or add days to jump in time.

See how your savings grow with compound interest and monthly contributions — full year-by-year breakdown.

Estimate your monthly mortgage payment, total interest and payoff date — with property tax, insurance and extra payments.

Find missing width or height for any aspect ratio. Presets for 16:9, 9:16, 1:1, 4:5 and cinema.

Calculate your GPA on a 4.0 scale. Add courses with credits and letter grades — see your average instantly.

Add, subtract, multiply or bitwise-combine binary, decimal or hex numbers. See results in all three bases.

Decode 4, 5 and 6-band resistor colour codes to resistance, tolerance and temperature coefficient.

Add, subtract, multiply or divide fractions and mixed numbers. Simplified, mixed and decimal results in one view.

Trig, logs, powers, roots, factorial and parentheses — with history and full keyboard support.

Solve A:B = C:D for a missing value, simplify ratios to lowest terms, and scale them up or down.

Solve any triangle from sides or angles — get area, perimeter and the missing side or angle.

Find your daily protein target from weight, activity level and goal. Grams per day and per meal.

Enter any two of voltage, current, resistance or power — get the other two using V=IR and P=VI.

Add up cash, gold, silver and business assets, subtract debts, and get 2.5% zakat instantly.

Find the midpoint between two coordinates, plus distance and slope — with worked-out steps.

Find the best bedtime or wake-up time using 90-minute sleep cycles.

Add weekly clock-in/out times, subtract breaks and get total hours, overtime and pay.

Add or subtract days, weeks, months or years from any date — with business-days mode.

Calculate running pace, time and speed — with 5K, 10K, half and full marathon splits.

Estimate calories burned by activity using standard MET values — walking, running, cycling and more.

Get personalised daily protein, carbs and fat for your goal using Mifflin-St Jeor BMR.

Estimate body fat percentage with the US Navy tape-measure formula — no calipers needed.

Healthy weight ranges from BMI plus four classic formulas (Devine, Robinson, Miller, Hamwi).

Find your estimated due date and current week of pregnancy from LMP or conception date.

Find your fertile window, likely ovulation day and the next three periods.

Find the best bedtime or wake-up time using 90-minute sleep cycles — wake at the end of a cycle, not the middle.

Calculate pace, time or distance. Presets for 5K, 10K, half and full marathon, with a km/mile splits table.