Feature Flag Rollout Calculator

Plan your gradual feature rollout. Calculate how many users are affected at each percentage step.

Total active users

Rollout percentage

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Rollout stages

Click Calculate to see your rollout plan

Rollout best practices

Begin with 1-5% of users. Monitor error rates, performance, and user feedback before expanding.

Hash on user ID so the same user always sees the same variant. FlagBit does this automatically.

Give each stage 24-48 hours minimum. Bugs often surface after the initial excitement fades.

Always be ready to instantly disable a flag. With FlagBit, that's one API call: {"enabled": false}

Ready to implement feature flags in your app?