🧮 Calculators
Everyday calculators that give you the answer instantly. No ads interrupting your flow, no pop-ups asking you to sign up.
Percentage CalculatorThree calculators in one — percent of, percent change, and what percent
Tip CalculatorSplit the bill, choose your tip percentage, round up with one click
BMI CalculatorMetric and imperial, animated spectrum bar, healthy weight range
Age CalculatorExact age in years, months, days, hours — plus next birthday countdown
Unit ConverterConvert length, weight, temperature, area, volume, speed and data
Mortgage CalculatorMonthly repayments, total interest and amortisation schedule
Compound Interest CalculatorSee how investments and savings grow over time
GST CalculatorAdd or remove GST — Australia, NZ, Canada, India and custom rates
VAT CalculatorAdd or remove VAT — UK, EU and custom rates with full breakdown
Currency ConverterLive exchange rates for 170+ currencies
Date CalculatorDays between dates, add or subtract days from any date
Working Days CalculatorCount business days, excluding weekends and public holidays
Meeting Cost CalculatorSee what your meetings really cost — live timer
Sleep Cycle CalculatorBest times to wake up based on 90-min sleep cycles
Loan CalculatorMonthly repayments, total interest and principal breakdown
Salary CalculatorConvert hourly, daily, weekly, monthly and annual salary
Calorie CalculatorDaily calorie needs (TDEE) for your goals
Water Intake CalculatorDaily hydration target based on weight and activity
Body Fat CalculatorEstimate body fat % using the US Navy method
Aspect Ratio CalculatorCalculate dimensions from ratios and scale proportionally
Scientific CalculatorTrig, logs, powers, constants and calculation history
Investment CalculatorCalculate investment growth and total returns
Grade CalculatorCalculate weighted average grade from assignments
GPA CalculatorCalculate GPA from letter grades and credit hours
Dog Age CalculatorConvert dog years to human years accurately
Break-Even CalculatorFind the units needed to cover all your costs
Fraction CalculatorAdd, subtract, multiply & divide fractions instantly
Statistics CalculatorMean, median, mode, std dev, quartiles & histogram
Pace CalculatorRunning pace, finish time & distance with splits
Probability CalculatorBasic, combined, conditional & dice probability
Retirement CalculatorProject savings, nest egg & withdrawal sustainability
Carbon Footprint CalculatorEstimate annual CO₂ from energy, travel & diet
Pregnancy Due Date CalculatorDue date, trimester, & milestones from LMP or IVF
Matrix CalculatorAdd, multiply, transpose, determinant & inverse
About these calculators
Every calculator on PocketTools is built to solve the real version of its problem — not just the simplest case. The tip calculator handles split bills and custom percentages. The BMI calculator supports both metric and imperial and shows your result in context. The percentage calculator handles all three common percentage problems on one page so you never have to wonder which formula to use.