Examples
Examples
Try the starting example
- Asset cost ($)
- 1000
- Residual value ($)
- 100
- Relative time fractions in full depreciation life
- 0.5,1,1,0.5
- Depreciation charge by supplied period ($)
- P1: 150.00; P2: 300.00; P3: 300.00; P4: 150.00
- Closing book value by period ($)
- P1: 850.00; P2: 550.00; P3: 250.00; P4: 100.00
- Total depreciation ($)
- $900.00
- Final residual book value ($)
- $100.00
Try another scenario
- Asset cost ($)
- 1000
- Residual value ($)
- 0
- Relative time fractions in full depreciation life
- 0.5,1,1,0.5
- Depreciation charge by supplied period ($)
- P1: 166.67; P2: 333.33; P3: 333.33; P4: 166.67
- Closing book value by period ($)
- P1: 833.33; P2: 500.00; P3: 166.67; P4: 0.00
- Total depreciation ($)
- $1,000.00
- Final residual book value ($)
- $0.00
Calculation method
Calculation method
Depreciation charge by supplied period ($)
Allocate cost−residual in proportion to the supplied positive time fractions; round cumulative charges to US cents, then difference successive cumulative values.
Closing book value by period ($)
Cost−cumulative allocated depreciation.
Total depreciation ($)
Cost−residual.
Final residual book value ($)
Last period closing value, exactly equal to the entered residual.
Symbols and units
- a
- Asset cost ($)
- b
- Residual value ($)
- c
- Relative time fractions in full depreciation life
Use the units shown. A list keeps the order in which you enter its values. The symbol ^ means “raised to the power of”.
Assumptions & limits
Assumptions & limits
- A time-proportional straight-line allocation over the complete life you supply. Fractions describe allocation weights, not tax conventions or an accounting policy recommendation.
Are these inputs private?
These calculations run in your browser. A shared link contains the values you choose to share. Only questions submitted to the separate AI finder are sent to OpenAI.
Further reading
OpenStax: depreciation methods and supplied estimates ↗
Background reading; this does not imply endorsement or independent review of SumFizz.