All Calculators

Body mass index, weight ranges and screening context.

Daily energy expenditure and calorie estimates.

Estimate body composition from tape measurements.

Compare four formulas and the BMI-based range.

Turn a calorie target into carbohydrate, protein and fat.

Estimate fluid intake from size and activity.

Explore training zones and maximum heart-rate estimates.

Pace, speed and race-time estimates.

Compare estimated lifting maximums across three formulas.

Estimate a fixed-rate monthly payment and explore the complete principal-and-interest schedule.

Estimate monthly principal and interest, plus the ownership costs you enter.

Explore growth from a starting balance with a fixed rate and a chosen compounding frequency.

Calculate interest charged on the original principal without compounding.

Find the monthly deposit needed to reach a target balance within a chosen time.

Calculate profit or loss as a percentage of the total cost you entered.

Estimate vehicle payments including cash down, trade-in equity, taxes and financed fees.

Find payoff time and interest savings when you add a fixed extra monthly payment.

Project a balance from an initial amount and regular monthly contributions.

Explore future costs and purchasing power at a constant inflation rate you choose.

Apply two successive discounts and an optional tax to a purchase price.

Add a tax rate to a price or extract tax from an inclusive total.

Compare gross profit, margin and markup without confusing their denominators.

Convert an hourly rate or annual salary into gross-pay equivalents.

Find the whole-unit sales volume needed to cover fixed and variable costs.

Estimate how long available cash lasts at a constant net monthly outflow.

Combine acquisition costs and newly acquired customers for a consistent period.

Estimate subscription gross-profit value using a simple monthly churn model.

Measure attributed revenue returned for each dollar of advertising spend.

Go beyond revenue ROAS by subtracting refunds and included campaign costs.

Account for shipping, processor fees, acquisition and expected return costs per order.

Set a replenishment trigger using demand, lead time and an entered safety-stock buffer.

Relate cost of goods sold to average inventory and days held during a reporting period.

Combine inventory, receivable and payable days into an operating cash-cycle estimate.

Find a gross amount needed to receive a target net amount after percentage and fixed fees.

Build a quote from internal labor cost, materials, expenses, contingency and markup.

Translate an annual income target and overhead into a billable-hour revenue requirement.

Compare plan spending over a horizon with full annual renewals and no proration.

Compare a cash price with discounted monthly payments using an entered opportunity-cost rate.

Balance replenishment order costs against inventory holding costs in the classical EOQ model.

Find a percentage of a number, a part-to-whole percentage or a percentage change.

Add, subtract, multiply or divide two fractions and reduce the answer.

Evaluate an expression with powers, roots, logarithms, trigonometry and factorials.

Find the arithmetic mean, median, sum and range of a list of numbers.

Measure the spread of a list using either the sample or population convention.

Generate whole numbers in an inclusive range, with optional duplicate prevention.

Reduce a pair of whole numbers to its simplest ratio and show each share.

Find the hypotenuse, area, perimeter and acute angles from two perpendicular legs.

Find rectangle, triangle or trapezoid area using consistent length units.

Calculate the volume of a box, cylinder, sphere or cone.

Find a circle’s area, circumference and diameter from its radius.

Solve ax² + bx + c = 0, including repeated, complex and linear cases.

Raise a base to a power with clear handling of zero and negative bases.

Find the exponent needed to produce a positive argument in a chosen base.

Calculate principal real roots, including odd roots of negative numbers.

Find the largest positive whole number dividing every entered integer.

Find an exact common multiple of a list of integers.

Compare a measured value with a non-zero reference using absolute percent error.

Combine two independent event probabilities for both, either, neither or exactly one.

Count selections of distinct items with or without order.

Fit a least-squares line to paired measurements and evaluate it at an entered x.

Smooth an ordered series and inspect each complete trailing window.

Combine independent standard uncertainty contributions already expressed in result units.

Find project duration, early and late task times, and zero-slack tasks in a dependency graph.

Calculate calendar age and the number of days until the next birthday.

Count calendar days between two dates or add and subtract days from a date.

Add or subtract seconds from a duration and convert the result to decimal hours.

Calculate net clock-time hours between a start and end, subtracting a break.

Convert length, weight, temperature, volume and speed using explicit unit definitions.

Calculate a tip and split the bill evenly across a group.

Estimate fuel quantity and trip cost using metric consumption or US fuel economy.

Calculate a credit-weighted average from grade points on a 0–4 scale.

Combine percentage scores and weights while distinguishing partial work from final grades.

Estimate concrete volume for a rectangular slab with an optional ordering allowance.

Estimate whole tiles from surface area, tile size and a cutting allowance.

Estimate liters of paint from area, coats and the product’s coverage rate.

Estimate energy and usage cost from average watts and operating hours.

Convert distance and elapsed time into average speed in three unit systems.

Measure fuel economy from distance traveled and fuel consumed.

Find a Gregorian date’s weekday, day number within its year and leap-year status.

Count Monday–Friday days, excluding the holiday dates you supply.

Estimate input, cached-input and output token charges for an entered request volume.

Model proportional request charges and a fixed plan charge without assuming a provider.

Relate average throughput, response time and in-flight requests using Little’s Law.

Translate a time-based availability percentage into allowed downtime over an entered period.

Estimate a declared set of full backups and daily incrementals after compression.

Estimate retention storage across cameras from an encoded bitrate and schedule.

Estimate uncompressed audio payload from sample rate, bit depth, channels and duration.

Convert pixel dimensions to a physical print size at an entered pixel density.

Estimate physical pixel density from active-screen resolution and diagonal size.

Find the largest crop matching a target ratio and the amount removed from each side.

Estimate constant-load runtime from nominal battery energy and an entered usable fraction.

Estimate energy from panel power, peak-sun hours and a retained-output assumption.

Estimate charging time from battery charge change, average input power and efficiency.

Compare annual electricity and gasoline costs for the same traveled distance.

Estimate rainfall collection and empty-tank overflow from a roof catchment.

Translate an entered watering depth and application efficiency into run time.

Calculate ideal replacement volume needed to reach an entered dissolved-concentration target.

Estimate ideal thermal energy and heating time before environmental losses.

Scale a named ingredient list to a different number of servings while preserving its units.

Include a starter’s flour and water when calculating dough hydration and salt percentage.