Household and savings
ROI Calculator
Estimate total and annualized return on an investment, plus simple payback time.
Quick math
Use this for quick arithmetic, percentages, or to check figures while filling in the main tool, without leaving the page.
Estimate
Estimated total return: 25.0%
- Total ROI
- 25.0%
- Annualized return
- 11.8%
- Simple payback
- 8.0 years
How this breaks down
- Initial investment
- 100,000 NOK
- Net gain or loss
- 25,000 NOK
- Holding period
- 2.0 years
Basic estimate. Annualized return assumes the total gain or loss compounds evenly; risk, inflation, taxes, and cash-flow timing are excluded.
How to use this tool
- Use ROI Calculator for the question described above, and check that the inputs match your records and time period.
- Enter initial investment.
- Enter net gain or loss.
- Enter holding period.
- Change initial investment, net gain or loss, holding period to compare scenarios, then check the units in the result.
Worked example with the prefilled values
This example shows how ROI Calculator uses its starting values. Change the calculator inputs to estimate your own situation.
- Initial investment
- 100000 NOK
- Net gain or loss
- 25000 NOK
- Holding period
- 2 years
Estimated total return: 25.0%
- Total ROI25.0%
- Annualized return11.8%
- Simple payback8.0 years
Basic estimate. Annualized return assumes the total gain or loss compounds evenly; risk, inflation, taxes, and cash-flow timing are excluded.
Formula and calculation logic
Total ROI = net gain or loss ÷ initial investment × 100%
Annualized return = (1 + total ROI)^(1 ÷ years) − 1
Simple payback = initial investment ÷ average annual net gain, when positive
Estimate total and annualized return on an investment, plus simple payback time.
The displayed formula below shows how the entered values are combined.
Assumptions
- Uses the values entered and simplifies real contracts, tax rules or personal circumstances. Update example values before relying on the estimate.
Published sources
Further reading for checking current rules and information. These links are not live inputs to the tool.
Questions about this tool
How is ROI calculated?
ROI is net gain or loss divided by the initial investment, expressed as a percentage.
What does annualized ROI mean?
It converts the total return over the entered period into a compound annual rate, assuming the ending value represents the full return.
How is payback time estimated?
Simple payback divides the initial investment by annualized net gain, when that gain is positive.
Does this include risk or inflation?
No. It is a basic estimate and does not model risk, taxes, inflation, or timing of cash flows.