# Function Point Productivity Calculator

> Measure how many hours each delivered function point actually took.

Page: https://freecalculator.tech/tools/function-point-productivity-calculator
Last reviewed: 2026-09-16

## Formula

Hours per function point = Effort hours ÷ Function points; Function points per person-month = Function points ÷ (Effort hours ÷ Hours per person-month)

- Hours per function point = Effort hours ÷ Function points; Function points per person-month = Function points ÷ (Effort hours ÷ Hours per person-month).
- Inputs used: Function points delivered, Effort spent, Hours in one person-month.
- Edge handling: Function points delivered is required.; Function points delivered cannot be negative.; Function points delivered must be no more than 1000000000.; Effort spent is required.; Effort spent cannot be negative..

## Inputs

- Function points delivered
- Effort spent
- Hours in one person-month

## Worked example: 480 function points delivered in 6,240 hours

Your own recorded effort and your own person-month convention; no industry delivery rate is supplied.
1. Start with Function points delivered: 480, Effort spent: 6240, Hours in one person-month: 152.
2. Apply the method: Hours per function point = Effort hours ÷ Function points; Function points per person-month = Function points ÷ (Effort hours ÷ Hours per person-month).
3. Your own recorded effort and your own person-month convention; no industry delivery rate is supplied.

## Common questions

### Where does this formula come from?

IFPUG, Function Point Counting Practices Manual — functional size is counted independently of technology, and delivery rate is effort per unit of functional size. See the source link on this page.

### What kind of calculation is this?

Delivery rate is recorded effort divided by counted functional size, expressed per function point and per person-month. Check the formula, example, and limitations on this page before using the result for a real professional & industry decision.

### What are its limits?

Measures past delivery; it is not itself a forecast. Comparable only across projects counted the same way.

### How do I use the Function Point Productivity Calculator?

Enter the required values for Function points delivered, Effort spent, Hours in one person-month. The calculator applies the formula on this page and shows the main result with any supporting breakdown so you can check the arithmetic.

### What formula does the Function Point Productivity Calculator use?

Hours per function point = Effort hours ÷ Function points; Function points per person-month = Function points ÷ (Effort hours ÷ Hours per person-month) The visible formula section above lists the calculation path and the edge cases the page handles, so the result can be checked without relying on the form alone. Check the formula, example, and limitations on this page before using the result for a real professional & industry decision.

### Can the Function Point Productivity Calculator be used for exact decisions?

Use it as a calculation aid, not as a substitute for checking the underlying rule, contract, policy, or professional advice that applies to your situation. When a result depends on local rules, personal details, prices, or dates, enter those values yourself and confirm them before acting.

## Limitations and assumptions

- Inputs outside the supported range are rejected rather than forced into a result.
- The result depends on the values you enter for this function point productivity calculator; it does not supply missing rates, rules, prices, dates, or assumptions for you.

## Sources

- International Function Point Users Group — https://www.ifpug.org/ifpug-standards/

## Cite this page

- APA: Free Calculator. (2026, September 16). Function Point Productivity Calculator. https://freecalculator.tech/tools/function-point-productivity-calculator
- MLA: "Function Point Productivity Calculator." Free Calculator, 16 Sept. 2026, https://freecalculator.tech/tools/function-point-productivity-calculator.
- Link: Function Point Productivity Calculator — Free Calculator, https://freecalculator.tech/tools/function-point-productivity-calculator