How RICE scoring works
RICE forces a feature to earn its place with four numbers instead of one opinion. You estimate how many people it reaches, how much it moves them, how sure you are, and how much work it takes. The formula does the rest.
Reach is the number of people affected in a chosen period, like users per quarter. Impact is a weighted score: massive is 3, high is 2, medium is 1, low is 0.5, minimal is 0.25. Confidence is a percentage that discounts guesswork: 100% high, 80% medium, 50% low. Effort is the cost in person-months. Dividing by effort is what keeps cheap, high-value work at the top.
How ICE scoring works
ICE is the faster, rougher cousin. Three numbers, each rated 1 to 10, no units to estimate. It is built for triaging a long list of raw ideas before any of them deserve a real RICE analysis.
Impact is how much it matters, Confidence is how sure you are, Ease is how quickly you can ship it. Ease replaces effort and runs the same direction as the others, so a higher number is always better. Multiply the three and rank.
Which one should you use
Use ICE early, when you have a pile of ideas and need to cut it down fast without pretending you know exact reach. Use RICE later, when you can put real numbers on reach and effort and you need a ranking you can defend to a team or a board. Many teams triage with ICE, then RICE the survivors.
The trap to avoid
A score is a tie-breaker, not a boss. RICE and ICE exist to end the loudest-voice problem and give you a defensible starting order. They do not see dependencies, strategic bets, or timing. Use the ranking to start the conversation from evidence, then apply judgment. A feature can be worth building at a low score because it unblocks three others, and the math will never tell you that.
Frequently asked questions
What is a good RICE score?
There is no universal cutoff, because scores depend on your reach and effort scales. What matters is the ranking relative to your other features, not the absolute number.
Why divide by effort in RICE?
Dividing by effort turns the score into value per unit of work. It is what stops a huge, expensive feature from automatically beating a small, high-leverage one.
Can I use this for non-product decisions?
Yes. RICE and ICE work for any list of competing options where you can estimate impact and cost, from marketing experiments to internal projects.
Does the calculator store my features?
No. Everything runs in your browser and nothing is saved or transmitted. Refreshing the page clears it.