Work out bearing life instantly with clear inputs, formula shown and shareable results.
Rolling bearing life follows the cube law L10 = (C/P)³ million revolutions, the life that 90 percent of identical bearings will reach. Because the exponent is three, halving the load multiplies life eightfold, which is why a modest reduction in load or a size increase transforms bearing life.
Basic rating life
L10 = (C / P)³ million revolutions
Life in hours
L10h = L10 x 10^6 / (60 x rpm)
Preliminary estimate only. Actual life depends on lubrication, contamination, alignment and temperature; consult the bearing manufacturer for adjusted life ratings.
L10 = (C / P)³ million revolutions. Rolling bearing life follows the cube law L10 = (C/P)³ million revolutions, the life that 90 percent of identical bearings will reach.
It is the tenth percentile of the failure distribution: 90 percent of bearings survive it. Median life is roughly five times longer, so L10 is deliberately conservative.
This calculator takes 3 inputs: Basic dynamic capacity C, Equivalent load P, Operating speed. The pre-filled defaults are a realistic worked example — replace them with your own site or project figures.