Get the numbers right
Everyday math · Page 2
Add, subtract, multiply and divide for everyday jobs.
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- Mean absolute deviation calculatorMeasure the average distance from the mean.
- Mileage reimbursement calculatorMileage reimbursement = eligible distance multiplied by your reimbursement rate.
- Modulo calculatorFind a nonnegative remainder, including for negative integers.
- Money weight calculatorMultiply a counted denomination by its unit mass and face value.
- Pennies to dollars calculatorConvert a whole number of US cents to dollars exactly, using 100 cents per dollar.
- Percent error calculatorCompare a measurement with a known reference.
- Percentage calculatorFind a percentage of a number and add or subtract it.
- Percentage change calculatorFind an increase or decrease from a starting value.
- Percentage difference calculatorCompare two values without choosing a baseline.
- Permutation combination calculatorCount selections with or without order, without replacement.
- Pizza calculatorRound your requested pizza portions up to whole pizzas.
- PoE budget calculatorSum switch-side device power and your reserve, then compare it with a switch’s total PoE budget.
- Prime factorization calculatorBreak a whole number into its prime factors.
- Projector brightness throw calculatorFind throw distance from image width × throw ratio, and ideal illuminance from lumens ÷ image area.
- Proportion calculatorSolve the missing numerator in two equal ratios.
- RAID capacity calculatorEstimate usable RAID capacity from equal-size drives and your chosen stripe, mirror or parity layout.
- Ratio calculatorSimplify a whole-number ratio and see each share.
- Rounding calculatorRound a decimal exactly to the chosen decimal place, with halfway values rounded away from zero.
- Scientific calculatorType a scientific expression, with degrees or radians.
- Scientific notation calculatorWrite a decimal as a coefficient from 1 up to 10 times a power of ten, without losing its numeric value.
- Show rundownBuild a running order from segment durations and see cumulative elapsed times.
- Significant figures calculatorCount significant digits and round a measured number to your chosen significant-figure count.
- Speedometer error calculatorAdjust indicated speed by replacement circumference ÷ original circumference.
- Square feet to cubic feet calculatorMultiply square footage by depth converted to feet to get cubic feet and cubic yards.
- Streaming bitrate calculatorSet a video bitrate budget by reserving part of your upload capacity, then subtracting audio and overhead.
- Study time calculatorDivide topic workload plus your review allowance across the study days you have available.
- Tip calculatorAdd a percentage tip to the bill, then divide the total equally.
- Tire size calculatorRead metric tire size as width, sidewall percentage and rim inches, then compare nominal outer diameters.
- Tv height calculatorPlace a screen center relative to seated eye height and calculate the top and bottom edges.
- Unit price comparisonCompare two package prices after dividing each by its quantity.
- Unit rate calculatorUnit rate = total amount divided by the number of units.
- Water weight calculatorConvert a water volume to mass with the density you supply.
- Weighted average calculatorAverage values that contribute different amounts.
- Wheel offset calculatorCompare how wheel width and offset move the inner and outer rim edges.
- Winning percentage calculatorWinning percentage = (wins + tie credit × ties) ÷ games × 100.
