Money is an abstract measure. Time is not. This calculator converts a price into the hours and workdays of take-home pay it represents, and shows how large a share of one month's pay it is.
How the calculation works
The core formula is short:
You can enter your pay in two ways:
- Per hour. The calculator uses that figure directly as your hourly pay.
- Per month. The calculator first estimates how many hours you work in a month: paid hours per workday × workdays per week × 52 ÷ 12. Your monthly pay divided by those hours gives your hourly pay.
From there it shows four results:
- Work hours needed = price ÷ hourly pay
- Working days = work hours ÷ paid hours per workday
- Share of a monthly salary = price ÷ monthly pay. If you entered hourly pay, monthly pay is estimated as hourly pay × monthly hours.
- Lifetime cost incl. recurring = price + recurring monthly cost × 12 × years recurring
The recurring cost fields are for things that keep costing money after you buy them, such as a phone plan, a service contract or a storage subscription. Note that the recurring cost only affects the lifetime cost figure. The work hours, working days and share of monthly pay are based on the purchase price alone.
Use take-home pay, the amount that actually lands in your account, because that is the money you spend.
Worked examples
Example 1 – a laptop on a monthly salary. Price 1,500. Take-home pay 3,500 per month. 8 paid hours per workday, 5 workdays per week. No recurring cost.
Monthly hours = 8 × 5 × 52 ÷ 12 ≈ 173.33. Hourly pay = 3,500 ÷ 173.33 ≈ 20.19.
Work hours = 1,500 ÷ 20.19 ≈ 74.3. Working days = 74.29 ÷ 8 ≈ 9.3. Share of monthly pay = 1,500 ÷ 3,500 ≈ 42.9%.
Example 2 – a phone with a monthly plan, paid by the hour. Price 600. Take-home pay 18 per hour. 7.5 hours per workday, 5 workdays per week. Recurring cost 25 per month for 2 years.
Work hours = 600 ÷ 18 ≈ 33.3. Working days = 33.33 ÷ 7.5 ≈ 4.4.
Monthly hours = 7.5 × 5 × 52 ÷ 12 = 162.5, so estimated monthly pay = 18 × 162.5 = 2,925. Share of monthly pay = 600 ÷ 2,925 ≈ 20.5%.
Lifetime cost = 600 + 25 × 12 × 2 = 1,200. The plan doubles the total, even though the hours figure only reflects the phone itself.
Example 3 – part-time work. Price 250. Take-home pay 1,800 per month. 6 hours per workday, 3 workdays per week.
Monthly hours = 6 × 3 × 52 ÷ 12 = 78. Hourly pay = 1,800 ÷ 78 ≈ 23.08.
Work hours = 250 ÷ 23.08 ≈ 10.8. Working days = 10.83 ÷ 6 ≈ 1.8. Share of monthly pay = 250 ÷ 1,800 ≈ 13.9%.
Example 3 shows why the calculator asks for your actual schedule. A part-time worker with a lower monthly income can still have a higher hourly rate, so the same price can represent fewer hours than you might guess from the monthly figure.
Work hours cost vs true hourly wage
This calculator applies an hourly value to a purchase. It takes your paid hours at face value. If your job also takes unpaid time, such as commuting, unpaid overtime or preparation, or costs you money to do, your real hourly value is lower. The true hourly wage calculator estimates that figure first. You can then enter the result here as pay per hour for a stricter conversion.
A thought behind the tool
Prices are set in money, but most people earn money by giving up time. Translating one into the other does not make a purchase right or wrong. It puts the cost in a unit that you, and nobody else, decide the value of. Some people find that a day of work for something they will use for years feels fair, and that an hour for something they will forget by next week does not. Where that line goes is personal.