Test the rule change before the league yells at you.
Pull your real Sleeper league, tweak any of 147 scoring settings, and watch the whole season re-score in place — who gains, who falls, and which matchups would have flipped.
Why it exists
What Scoring Calculator actually does
- Capability
- Rank shifts
- Capability
- Matchup flips
- Capability
- Season replay
- Price
- Free
- Data
- Read-only Sleeper API
- Auth
- Username only
- Scope
- Any Sleeper account
- 01
It re-scores your actual season
No hypothetical rosters. The calculator replays every real stat line your league already produced under the new rules, so the argument is over before it starts.
- 02
Every setting Sleeper supports
PPR, TE premium, first downs, IDP, return yards, sack yardage — all 147 stat categories are editable, with your league’s current values as the baseline.
- 03
Rank shifts, named and numbered
See exactly which players gain or lose value under the proposal. "TE premium helps Trey McBride" is a guess; +38 points and 11 spots is a case.
- 04
Matchup flips and standings replay
The part your league actually cares about: which weeks would have gone the other way, and where everyone would have finished. Continuation leagues get a full multi-season Replay.
- 05
Built for the proposal thread
Compare presets side by side, isolate one category’s impact, and drop the results in the group chat as evidence rather than vibes.
How it works
Ninety seconds, start to verdict
Enter your Sleeper username
We pull your leagues read-only from the Sleeper API. No password, no OAuth, nothing to install.
Change the rules
Bump TE receptions to 1.5, add first-down points, zero out kickers — every edit re-scores live.
Read the fallout
Rank shifts, matchup flips, and replayed standings, side by side with what actually happened.
Fine print
Questions, answered
Does it work with my Sleeper league?
Yes. Enter any Sleeper username and the calculator loads that account’s leagues — rosters, scoring settings, and every weekly stat line — read-only through the public Sleeper API.
Will it change my league’s real settings?
No. It’s a sandbox. Nothing is ever written back to Sleeper — you experiment here, then propose the change to your league with the receipts.
Do I need an account?
No account needed to run what-ifs — a Sleeper username is enough. Signing in (magic-code email, no password) just saves your leagues for next time.
What scoring formats does it handle?
Everything Sleeper supports: standard, half-PPR, full PPR, TE premium, first-down points, IDP, kicker distance tiers, return yardage, and the other ~140 stat categories.
More from the toolkit
All tools →Lineup Auditor
League Command · start/sit accountability
Audit every lineup in your Sleeper league
Manager Intel
Vet a manager before the invite
Run a background check on any Sleeper username: career record, championships, week-by-week lineup reliability, and transaction habits from the last three seasons of their Sleeper leagues.