# Rates

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

Units of rates of 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.

If you would rather express this proportion as a simplified rate, use a converter:

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

$50/week × 12 weeks | $600.00

$24 a day for a year | $8,765.82

500/day to / year | 182,621.25/year

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