Rate Calculations

First-rate rate handling

A rate is a quantity of one unit to in relation to another

3 hours / day                                        | 3 hours/day
$99 per week                                         | $99.00/week

Soulver also supports rates with no unit

30 bottles / week                                    | 30/week
30/week as / month                                   | 130/month

You can add/subtract rates

$20/day + $300/week                                  | $440.00/week

And convert them into other compatible forms

€30/day in €/month                                   | €913.11/month

A simplified rate is also produced from a division of units of different kinds:

90 km / 3 day                                        | 30 km/day

Mathematics requires that units of rates in the same unit category cancel each other out when dividing:

3 hours / 3 days = 0.0416667

This is essentially the first number as a proportion of the second number (10,800 s / 259,200 s), expressed as a decimal.

It can be more helpful to simplify the rate without cancelling units. If you would rather express the proportion as a simplified rate, you can specify the format explicitly:

3 hours / 3 days as hour/day = 1 hour/day

Multiplying rates

$50/week × 12 weeks                             | $600.00
$24 a day for a year                            | $8,765.82
500/day to / year                               | 182,621.25/year

Handy rate-related phrases

Here are some convenient built-in phrases for doing calculations with rates

30 hours at $30/hour                                | $900.00
$500 at $20/hour                                    | 25 hours