The formula gets rearranged depending on which variable you need. Here are the patterns you’ll run into in the real world — find the one that matches your problem and follow the worked steps.
01 · PATTERN
Property cost ($) halved
cost = 125000 (from 250000)
Keep every other input at its default and halve the property cost ($). See how annual depreciation responds.
- 01New Property cost ($): 125000
- 02Baseline Annual depreciation: 9090.91
- 03New Annual depreciation: 4545.45
- 04Annual depreciation decreases by 50% → use this sensitivity to plan for real-world variation.
02 · PATTERN
Property cost ($) doubled
cost = 500000 (from 250000)
Keep every other input at its default and double the property cost ($). See how annual depreciation responds.
- 01New Property cost ($): 500000
- 02Baseline Annual depreciation: 9090.91
- 03New Annual depreciation: 18181.8
- 04Annual depreciation increases by 100% → use this sensitivity to plan for real-world variation.
03 · PATTERN
Useful life (years) halved
years = 13.75 (from 27.5)
Keep every other input at its default and halve the useful life (years). See how annual depreciation responds.
- 01New Useful life (years): 13.75
- 02Baseline Annual depreciation: 9090.91
- 03New Annual depreciation: 18181.8
- 04Annual depreciation increases by 100% → use this sensitivity to plan for real-world variation.
04 · PATTERN
Useful life (years) doubled
years = 55 (from 27.5)
Keep every other input at its default and double the useful life (years). See how annual depreciation responds.
- 01New Useful life (years): 55
- 02Baseline Annual depreciation: 9090.91
- 03New Annual depreciation: 4545.45
- 04Annual depreciation decreases by 50% → use this sensitivity to plan for real-world variation.