Quick guide
How to use this calculator
- Enter each quantity together with the exposure over which it occurred.
- Keep exposure units consistent across rows.
- Use total quantity divided by total exposure—not the unweighted average of row rates.
Calculation method
Aggregate numerators and denominators first
The combined rate is the sum of quantities divided by the sum of exposures. The calculator also shows the naive row-rate average so the weighting difference is visible.
Worked example
Combine work rates
Producing 10 units in 2 hours and 12 units in 4 hours gives 22/6 units per hour, not the simple mean of 5 and 3.
aggregate rate = (10+12)/(2+4) = 11/3
Supported inputs
Precision and limits
List size
Add 1–100 labelled value rows.
Decimal size
Each value may contain up to 200 digits and 100 decimal places.
Exactness
Exact rational results are never replaced by a rounded decimal; approximations are labelled.
Exposure
Every exposure must be strictly positive and use the same unit.
Scope
This is a general aggregate-rate tool; journey speed and arrival workflows remain in Travel & Motion.