Every dynasty manager has been on both sides of a bad trade. Sometimes you fleece a leaguemate; sometimes you wake up two months later realizing you were the one being fleeced. The numbers always tell the story — they just don't tell it loudly enough at the moment a trade offer hits your inbox.

FantasyTradeLab exists to make those numbers louder. We built a dynasty trade calculator that does one thing well: weigh every player on each side of a trade against a transparent, age-adjusted value formula, then tell you whether the deal is fair, a slight edge, or a clear win. No subscriptions. No email signups. No paywall behind the verdict.

What we actually do.

The calculator rates 190+ MLB players and 35+ top prospects on a 1–99 dynasty value scale. Every value blends three signals: current production, projected ceiling over the next 3–5 seasons, and an age multiplier that rewards younger players and progressively discounts veterans. Prospects use a future-weighted variant plus an upside bonus to reflect their dynasty optionality.

Values are calibrated against industry consensus from RotoProspects, Baseball America's top dynasty rankings, and Imaginary Brick Wall — not invented in a vacuum. We refresh them at predictable points each season rather than chasing weekly hype cycles, so the rankings reflect long-term dynasty value, not last week's hot streak.

Who built this.

FantasyTradeLab is run by dynasty players, not a media corporation. We made the calculator we wished existed: clean, fast, accurate, and respectful of your time. Every design decision — from the soft palette to the dark mode toggle to the shareable trade URLs — comes from years of sitting in our own league chats arguing about whether some offer was actually fair.

If our work helps you win a championship, or escape a trade you should have rejected, we've done our job.