Fantasy Football FAAB Calculator
Turn a waiver bid percentage into dollars, see how much of your remaining budget it uses, and keep a reserve for later moves. Choose the percentage yourself; this free calculator helps you plan the cost, not predict the winning bid.
Plan your waiver bid
Enter your own percentage or one from a waiver recommendation. The defaults are an example, not a recommended bid for any player. FAAB dollars are your league’s virtual budget.
Your planned bid
$15
$50 left if this claim succeeds · $55 maximum while keeping your reserve
15.0% of your starting budget · 23.1% of your remaining budget
Rounded to the nearest whole dollar before applying the reserve cap. This calculation does not account for other pending claims, minimum bid rules, roster eligibility or rival bids. It does not submit a claim.
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Starting budget or remaining budget?
Check the basis whenever you read a FAAB recommendation. A 15% bid means $15 in a $100 starting-budget league, even if you have already spent $35. But 15% of the $65 you have left is $9.75, which this calculator rounds to $10. Those bids are different decisions. The budget selector lets you make that distinction explicitly rather than quietly switching the denominator midway through the season.
Three worked waiver-bid examples
- $100 starting budget, $65 remaining, 15% of the starting budget, $10 reserve: plan a $15 bid. A successful claim leaves $50. The bid uses 23.1% of the money you have left.
- $1,000 starting budget, $400 remaining, 20% of the starting budget, $50 reserve: plan a $200 bid. A successful claim leaves $200. A familiar 20% headline now costs half your remaining budget.
- $100 starting budget, $12 remaining, 20% of the starting budget, $5 reserve: the percentage converts to $20, but only $7 fits your plan. The calculator caps the bid at $7 and leaves $5. Lowering your reserve is a separate choice; the tool does not make it for you.
How much FAAB should you spend on a player?
Begin with the lineup change you are buying. A player who replaces a weak starter for several weeks has a different use than a one-week bye replacement or an interesting bench stash. Check the injury context, the available alternatives and your next few lineup gaps before assigning a percentage. A high waiver rank identifies an expert preference; it does not tell you the price your particular league will pay.
- Name the player you would drop. If the incoming player would stay behind everyone on your bench, price the move as depth rather than an automatic starter.
- Review recent comparable winning bids in your own league. Use them as context, not a guarantee: different players, weeks and rival needs change the auction.
- Set your maximum acceptable cost before checking the conversion. Ask whether you would still like the move if a better option appeared next week.
- Choose a reserve that fits your league’s remaining waiver runs, minimum bid and free-agent rules. The example reserve is not a universal recommendation.
- Add fallback claims, then check how your platform orders them and handles conditional drops. Recalculate after any successful claim changes your balance.
Minimum bids, ties and rounding
Use whole dollars here. The tool rounds the percentage conversion to the nearest dollar, then applies your remaining-budget and reserve limit. Sleeper’s help documentation lists $0 as the default minimum and rolling waiver priority as its tied-bid tiebreaker; commissioners can change the minimum. Confirm the rules in your own league before entering the result. A $0 result is not a valid claim in a league that requires at least $1.
- Sleeper: how FAAB bidding worksOfficial bidding, tiebreaker and minimum-bid documentation. Checked September 8, 2026.
- Find this week’s waiver optionsResearch the pickup before deciding what it is worth to your roster.
Give your next waiver move some league context.
Make your next move part of a better fantasy season. Connect your Sleeper or ESPN league to the free LeagueLogs app for league-aware tools, AI chat and your league’s history. Boosted leagues also get personalized weekly newsletters.
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- Your league's full history, plus push alerts the moment its drama happens
Frequently Asked Questions
- What is the formula for a FAAB bid?
- Multiply the budget used by the recommendation by the bid percentage, then divide by 100. This calculator rounds to the nearest whole dollar and caps the result at your remaining balance minus your chosen reserve.
- Does this calculator recommend the winning FAAB bid?
- No. You enter the percentage. It converts that percentage into dollars and shows the effect on your budget. It does not model player value, your opponents’ sealed bids or the chance of winning.
- Can I use it for a $200 or $1,000 FAAB budget?
- Yes. Enter your actual starting and remaining balances. A 10% bid is $20 against a $200 starting budget and $100 against a $1,000 starting budget, before any reserve cap.
- Does it handle several waiver claims at once?
- No. The result describes one successful claim. Other successful claims can change both your balance and roster. Review your platform’s claim order, drop conditions and total potential spending before submitting.
- Can my remaining FAAB be greater than my starting budget?
- The calculator permits it, so it can represent commissioner adjustments or budget transfers where your league allows them. Check the platform’s budget limits separately.