Estimate your one-rep max from a weight and rep count.
Uses the Epley formula: 1RM = weight × (1 + reps/30).
Calculate your recommended daily water intake.
Find what day of the week any date falls on.
Estimate how much a customer is worth over time.
Calculate how much it costs to acquire a customer.
Calculate customer churn and retention rate.
Calculate straight-line depreciation of any asset.
Donaldson R F