Calculate how many working hours (weekdays, business hours only) fall between two moments.
Calculate the pace you need for a race goal time.
Calculate swimming pace per 100m and predict other distances.
Calculate voltage, current, resistance, or power.
Calculate resistor value from color bands.
Month-by-month loan schedule with interest, principal and balance. Add extra payments.
Add VAT or GST to a price, or remove it from a tax-inclusive total.
Donaldson R F