Tolerance Stack-Up Calculator
How to do a tolerance stack-up
- List each dimension in the chain on its own line, such as 25 ± 0.1, or 25 +0.1 -0.05 for unequal tolerances.
- Start a line with - for a dimension that is subtracted, such as a gap measured the other way.
- Compare the worst-case range with the RSS (statistical) tolerance.
Frequently asked questions
Worst case or RSS?
Worst case assumes every part is at its limit at once, which is safe but strict. RSS assumes the variations are independent and random, which is more realistic for many parts in a chain.
More engineering calculators
Ohm's Law CalculatorResistor Color Code CalculatorVoltage Divider CalculatorLED Resistor CalculatorSeries and Parallel CalculatorVoltage Drop CalculatorWire Gauge ChartBattery Life Calculator555 Timer CalculatorTorque CalculatorGear Ratio CalculatorPulley and Belt CalculatorBeam Deflection CalculatorConcrete CalculatorRebar CalculatorBoard Feet CalculatorPaint CalculatorFlooring CalculatorRoof Pitch CalculatorPipe Flow CalculatorReynolds Number CalculatorHeat Loss CalculatorBTU CalculatorSignificant Figures CalculatorScientific Notation ConverterEngineering Notation ConverterScrew Thread ChartSubnet CalculatorNumber Base ConverterDownload Time CalculatorAspect Ratio Calculator