Rate Calculations

First-rate rate handling

A rate is a quantity of one unit 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

File transfer time

Calculate how long a file takes to upload, download, or copy at a given speed:

time to upload 3GB at 10 MB/s → 5 min

Use MB/s for megabytes per second or Mbps for megabits per second. There are eight bits in a byte.

Pace

Calculate your running pace from a distance and time:

5 km in 25 min → 05:00/km

10 mi in 55 min → 05:30/mi

The answers show minutes and seconds per kilometer or mile.