Get the numbers right
Online calculators · Page 10
Type a calculation, change a number and get an answer you can use.
/
Search by tool or task. Use ↓ to choose, Enter to open.
Browse by task
Even eight arms couldn’t find that.
Try a shorter name, like “text”, “color” or “code”.
- Segment area calculatorCircular segment area = radius² × (angle in radians − sin(angle)) ÷ 2.
- Series and parallel capacitor calculatorCalculate total capacitance in parallel by addition and in series by reciprocal addition.
- Series resistance calculatorFor resistors in series, add the resistance values.
- Show rundownBuild a running order from segment durations and see cumulative elapsed times.
- Siding clapboard calculatorCount clapboard courses from exposed height, then whole boards per course.
- Significant figures calculatorCount significant digits and round a measured number to your chosen significant-figure count.
- Simple interest calculatorSimple interest = principal × annual rate × years ÷ 100. Final amount adds principal.
- Slope calculatorFind a line’s slope and y-intercept from two points.
- Snow water equivalent calculatorConvert snow depth to water-equivalent depth using the density ratio.
- Snow weight calculatorCalculate snow mass = area × depth × supplied density.
- Sod calculatorRound required turf area plus your waste allowance up to whole rolls or pallets.
- Solar panel calculatorEstimate daily energy = rated array kW × equivalent peak-sun hours × retained fraction.
- Specific heat calculatorSpecific heat = heat transferred ÷ (mass × temperature change).
- Speed calculatorAverage speed = distance ÷ elapsed time.
- Speedometer error calculatorAdjust indicated speed by replacement circumference ÷ original circumference.
- Sphere calculatorSphere volume = 4πr³/3. Surface area = 4πr².
- Spring constant calculatorSpring constant = force magnitude ÷ extension magnitude.
- Square feet to cubic feet calculatorMultiply square footage by depth converted to feet to get cubic feet and cubic yards.
- Stair calculatorDivide total rise into equal risers and calculate the run for one fewer tread than risers.
- Standard error calculatorEstimate uncertainty in a sample mean.
- Statistics calculatorGet mean, median, mode, spread and quartiles from a list.
- Steps distance calculatorEstimate walking distance from your measured one-step length and step count.
- Stock average calculatorCombine an existing holding with an additional purchase.
- Stock profit calculatorWork out a trade’s gain or loss after transaction fees.
- 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.
- Sum of squares calculatorCalculate Σx² and the centered sum Σ(x − mean)² for your list.
- Surface area calculatorFind the complete outside area of a box, sphere, right circular cylinder or cone.
- System of equations solverSolve two linear equations in x and y.
- T test calculatorCompare sample means with an independent-sample Welch t test or a paired t test.
- Tank volume calculatorCalculate liquid volume at a measured fill depth in a horizontal circular cylinder.
- Terminal velocity calculatorBalance weight against quadratic drag: terminal speed = √(2mg/(density × drag coefficient × area)).
- Theoretical yield calculatorConvert a known limiting-reactant amount to product using the balanced-equation coefficient ratio.
- Tile calculatorTiles = surface area ÷ coverage per tile × (1 + allowance ÷ 100), rounded up.
- 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.
