Everyday Calculators

Simple calculators for the small math problems of daily life, from splitting a restaurant check to planning a budget. Every calculator runs in your browser, so nothing you enter is stored or sent anywhere.

Split Bill CalculatorSplit a bill evenly or by item, with tax and tip. Budget Planner CalculatorPlan your monthly budget with the 50/30/20 rule, custom splits and real line items. GPA CalculatorCalculate weighted and unweighted GPA, track cumulative GPA and plan a target. Fertilizer/Lawn CalculatorCalculate NPK fertilizer, grass seed, lime, topdressing and spreader calibration. Screen Time CalculatorSee your daily, weekly, yearly and lifetime screen time plus a digital wellbeing score. Percentage CalculatorWork out percent of a number, percent change, percent difference and reverse percentages with steps and a picture. Age CalculatorFind your exact age in years, months and days, next birthday, planet ages and milestone dates. BMI CalculatorBody mass index in metric or US units with WHO and Asian cut-offs, healthy weight range and goal weight. Loan CalculatorMonthly payment, total interest and amortization schedule with extra payments and term comparison. Compound Interest CalculatorGrow savings with deposits, any compounding frequency, inflation, goal planner and the Rule of 72. Fraction CalculatorAdd, subtract, multiply and divide fractions and mixed numbers with steps, then simplify and compare. Days Between Dates CalculatorCount days, weeks, months and weekdays between dates, add or subtract time and run a countdown. Discount CalculatorSale price after percent off, stacked discounts, coupons and tax, plus reverse price and deal comparison. Hourly to Salary CalculatorConvert hourly pay to annual, monthly, weekly and daily pay with overtime, tax estimate and offer comparison. Average CalculatorMean, median, mode, range, standard deviation, quartiles, outliers, weighted average and missing number. Unit Price CalculatorCompare up to six products by price per ounce, kg, litre or item, with cost per use and shrinkflation. Electricity Cost CalculatorRunning cost of any appliance per hour, month and year, a whole-home list and upgrade payback. Pay Raise CalculatorNew salary after a raise, real raise after inflation, the raise needed to keep up and yearly projections. Subscription Cost CalculatorTotal subscriptions per month and year, test cancelling, price rises and monthly versus annual plans. Gas Trip Cost CalculatorFuel and cost of a road trip in miles or km, split between passengers and compared with an EV.