Quick answer
RICE score = reach × impact × confidence ÷ effort. A project reaching 1,000 people, with impact 2, 80% confidence and 4 person-months of effort scores 1,000 × 2 × 0.8 ÷ 4 = 400.
Enter reach, impact, confidence and effort. The calculator returns the RICE score for comparing tasks. It ranks tasks by priority using a RICE score.
Related tools: Goal Progress Calculator: Percent complete toward a target. Time Saved Calculator: Hours saved over a year by speeding up a task. Focus Session (Pomodoro) Calculator: How many focus sessions and breaks fit in the time you have.
How to use the Task Priority Score Calculator
- Enter reach (people or events per period) (above 0).
- Enter impact score (above 0).
- Enter confidence (%) (between 0 and 100).
- Enter effort (person-months) (above 0).
- Press Calculate to see the result, and use Reset to start again.
| Input | What to enter | Allowed values |
|---|---|---|
| Reach (people or events per period) | A number | > 0 |
| Impact score | A number | > 0 |
| Confidence | A number, in % | > 0, ≤ 100 |
| Effort (person-months) | A number | > 0 |
Formula and method
Formula
RICE = reach × impact × confidence ÷ effort
IEEE-754 double precision; shown to the decimals indicated.
Higher scores rank higher; the scales are your own, so keep them consistent between tasks.
Worked examples
These examples are verified: each one is an automated test case that the live calculator must reproduce exactly.
Example 1
Inputs: Reach (people or events per period) = 1000; Impact score = 2; Confidence = 80; Effort (person-months) = 4.
| Result | Value |
|---|---|
| RICE score | 400 |
Example 2
Inputs: Reach (people or events per period) = 300; Impact score = 1; Confidence = 50; Effort (person-months) = 2.
| Result | Value |
|---|---|
| RICE score | 75 |
Example 3
Inputs: Reach (people or events per period) = 5000; Impact score = 0.5; Confidence = 100; Effort (person-months) = 10.
| Result | Value |
|---|---|
| RICE score | 250 |
The first line is the headline result (rICE score). IEEE-754 double precision; shown to the decimals indicated.
What the inputs mean
Reach is how many people or events are affected in a period. Impact is typically scored 0.25, 0.5, 1, 2 or 3. Confidence is a percentage showing how sure you are. Effort is in person-months or similar units.
Scores are for comparing
The absolute number has no meaning on its own, only the order of scores when you rate each task on the same scale. Sort tasks by score, then check that the ranking matches common sense.
How the result changes with reach
Holding every other input at the first worked example, this table changes only reach. It shows how sensitive the answer is to that one value; each row was produced by running this calculator.
| Reach | RICE score |
|---|---|
| 500 | 200 |
| 1000 | 400 |
| 2000 | 800 |
| 4000 | 1,600 |
What happens with invalid input
These messages are produced by the calculator itself, so you know what to fix.
- Reach (people or events per period): entering "0" shows "Reach (people or events per period) must be greater than 0." beside that field and no result.
- Effort (person-months): entering "0" shows "Effort (person-months) must be greater than 0." beside that field and no result.
Choosing between the Task Priority Score Calculator and similar calculators
Each row shows what a related calculator on this site asks for and what it returns, so you can pick the one that matches your question.
| Calculator | You enter | It returns |
|---|---|---|
| [Goal Progress Calculator](/lifestyle/goal-progress-calculator/) | current value and target value | Progress |
| [Time Saved Calculator](/lifestyle/time-saved-calculator/) | times the task is done per day, minutes saved each time and working days per year | Time saved per year |
| [Focus Session (Pomodoro) Calculator](/time/focus-time-calculator/) | time available, focus session and short break | Focus sessions |
| [Hourly Productivity Calculator](/time/hourly-productivity-calculator/) | units completed and hours worked | Units per hour |
| [Pomodoro Sessions Calculator](/time/pomodoro-sessions-calculator/) | time available, focus session and short break | Focus sessions |
Assumptions and limitations
- Comparable only within one set of scales
If a required value is empty, not a number, or outside its allowed range, the form marks that field with a message and shows no result instead of a misleading number. The automated checks deliberately try invalid entries for reach (people or events per period) and effort (person-months) to confirm this.
Frequently asked questions
Who created RICE?
Intercom's product team described it.
What if confidence is low?
The score drops in proportion.
Can I use it for personal tasks?
Yes. Score personal projects on the same scales and compare the results.
What does the Task Priority Score Calculator calculate?
RICE priority score: reach × impact × confidence ÷ effort. It returns RICE score.
What formula does the Task Priority Score Calculator use?
RICE = reach × impact × confidence ÷ effort. Higher scores rank higher; the scales are your own, so keep them consistent between tasks.
What do I need to enter in the task Priority Score Calculator?
You enter Reach (people or events per period), Impact score, Confidence (%) and Effort (person-months).
How is the result rounded or limited?
IEEE-754 double precision; shown to the decimals indicated. Comparable only within one set of scales.
What is an example of a task Priority Score result?
With reach (people or events per period) 1000, impact score 2, confidence 80 and effort (person-months) 4, the rICE score is 400.
Where does the method come from?
The method follows: Intercom RICE prioritization framework.
Related calculators
- Goal Progress Calculator — Percent complete toward a target.
- Time Saved Calculator — Hours saved over a year by speeding up a task.
- Focus Session (Pomodoro) Calculator — How many focus sessions and breaks fit in the time you have.
- Hourly Productivity Calculator — Output per hour, time per unit and the hours needed to reach a target.
- Pomodoro Sessions Calculator — Number of focus sessions that fit in the time you have.
- Project Duration Calculator — Working days and finish date for a project from total effort, team size and daily hours.
Sources
- Intercom RICE prioritization framework
Content last reviewed 2026-11-04. Formulas and worked examples are checked by automated tests against independently computed values.