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Activity Depreciation

Activity-based depreciation. Free online Activity Depreciation. Calculate activity depreciation online — fast, accurate, mobile-friendly, no signup needed.

Depreciation
$10,800.00

Derivation

  1. ├── 01Givencost = 100000, salvage = 10000, total_units = 100000, units = 12000
  2. ├── 02Formula(e.cost-e.salvage) / e.total_units × e.units
  3. ├── 03Substitute(e.100000-e.10000) / e.100000 × e.12000
  4. └── 04Compute Depreciation$10,800.00
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§01What is

Understanding the Activity Depreciation

The Activity Depreciation computes Depreciation from 4 inputs: cost ($), salvage ($), total units, units this period. Activity-based depreciation.

Quick calculators for the math that shouldn’t need a notepad — instant, accurate, private to your browser. The Activity Depreciation sits in that toolkit — it activity-based depreciation. Enter your numbers above and the result updates instantly; every step of the math is shown in the Derivation panel so you can see exactly how the answer was reached.

§02The Formula

How it’s calculated

(e.cost-e.salvage) / e.total_units × e.units

Where

cost
Cost ($)
salvage
Salvage ($)
total_units
Total units
units
Units this period
§03Practical Example

Step-by-step walkthrough

Scenario

Apply the formula to a realistic set of inputs: Cost ($) = 100000, Salvage ($) = 10000, Total units = 100000, Units this period = 12000.

  1. 01Start by noting the input — Cost ($): 100000.
  2. 02Start by noting the input — Salvage ($): 10000.
  3. 03Start by noting the input — Total units: 100000.
  4. 04Start by noting the input — Units this period: 12000.
  5. 05Substitute these values into the formula: (e.cost-e.salvage) / e.total_units × e.units
  6. 06Compute Depreciation: the calculator returns 10800.
  7. 07Cross-check the answer by opening the Derivation panel above — every line of math is shown so you can follow the computation end-to-end.
§04Variants

Common Activity Depreciation Problems

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

Cost ($) halved

cost = 50000 (from 100000)

Keep every other input at its default and halve the cost ($). See how depreciation responds.

  1. 01New Cost ($): 50000
  2. 02Baseline Depreciation: 10800
  3. 03New Depreciation: 4800
  4. 04Depreciation decreases by 55.6% → use this sensitivity to plan for real-world variation.
02 · PATTERN

Cost ($) doubled

cost = 200000 (from 100000)

Keep every other input at its default and double the cost ($). See how depreciation responds.

  1. 01New Cost ($): 200000
  2. 02Baseline Depreciation: 10800
  3. 03New Depreciation: 22800
  4. 04Depreciation increases by 111.1% → use this sensitivity to plan for real-world variation.
03 · PATTERN

Salvage ($) halved

salvage = 5000 (from 10000)

Keep every other input at its default and halve the salvage ($). See how depreciation responds.

  1. 01New Salvage ($): 5000
  2. 02Baseline Depreciation: 10800
  3. 03New Depreciation: 11400
  4. 04Depreciation increases by 5.6% → use this sensitivity to plan for real-world variation.
04 · PATTERN

Salvage ($) doubled

salvage = 20000 (from 10000)

Keep every other input at its default and double the salvage ($). See how depreciation responds.

  1. 01New Salvage ($): 20000
  2. 02Baseline Depreciation: 10800
  3. 03New Depreciation: 9600
  4. 04Depreciation decreases by 11.1% → use this sensitivity to plan for real-world variation.
§05FAQ

Frequently asked questions

Yes. The calculator implements the standard formula as documented and returns exact floating-point results. No approximations are used unless noted in the formula.
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