All Calculators
All available NumOwl calculators in one list.
Scientific CalculatorA keyboard-friendly scientific calculator for expressions, trigonometry, logarithms, powers, roots, constants, and recent answers.Percentage CalculatorFind percentages, ratios, original values, percent change, increases, and decreases.Loan CalculatorEstimate monthly loan payments, total interest, repayment, and a simple amortization schedule.Paint CalculatorEstimate paintable wall area and paint quantity for metric or imperial room measurements.Tile CalculatorEstimate tile quantity from surface size, tile size, and waste allowance.Wallpaper CalculatorEstimate wallpaper rolls from wall dimensions, openings, roll size, and waste.Brick CalculatorEstimate brick quantity from wall size, brick size, mortar joint, and waste.Fraction CalculatorAdd, subtract, multiply, or divide two fractions and simplify the result.Compound Interest CalculatorEstimate future value and interest earned with compound interest.Savings CalculatorEstimate savings growth with monthly deposits and an annual return.BMI CalculatorCalculate body mass index from height and weight.BMR CalculatorEstimate basal metabolic rate with the Mifflin-St Jeor equation.Calorie CalculatorEstimate daily maintenance calories from BMR and activity level.Length ConverterConvert meters into common length units.Weight ConverterConvert kilograms into pounds, ounces, and grams.Temperature ConverterConvert Celsius into Fahrenheit and Kelvin.Age CalculatorEstimate age from birth year and current year.Date Duration CalculatorCalculate a simple duration between two day numbers.Time Duration CalculatorCalculate elapsed time from decimal-hour start and end times.Grade CalculatorCalculate a weighted grade contribution from score and weight.GPA CalculatorCalculate GPA from total grade points and credits.Weighted Average CalculatorCalculate a weighted average for two values.Recipe ScalerScale an ingredient amount from original servings to desired servings.Grams to Cups CalculatorConvert grams to cups using a grams-per-cup density.Cooking Measurement ConverterConvert tablespoons into cups, teaspoons, and milliliters.Ohm's Law CalculatorCalculate voltage from current and resistance.Force CalculatorCalculate force from mass and acceleration.Density CalculatorCalculate density from mass and volume.Profit Margin CalculatorCalculate profit and profit margin from revenue and cost.Markup CalculatorCalculate markup percentage from cost and selling price.Break-Even CalculatorEstimate how many units are needed to cover fixed costs.