Why "$1 a mile" isn't your rule
The folk rule floating around every driver forum — take it if it pays $1 (or $2) a mile — has a real problem: it prices every driver's time and car identically, and it prices a 2-mile order the same as a 12-mile one. Your car might cost 25¢ a mile to run or 45¢. Your market might support an $18/hour target or a $25 one. And every delivery carries a fixed chunk of time — the wait at the restaurant, the walk to the door — that a per-mile rule can't see. Small offers live or die on that fixed time, not the mileage.
The honest math has three parts: what the miles cost your car, what the minutes are worth against your target, and what the offer pays. Put together: an offer clears your target when it pays more than your stop-time cost plus your true per-mile cost times the miles. That's the whole site in one sentence — the calculator above does it live, and the Decline Sheet does it in advance.
Worked example
Miles you drive but don't get paid for
A 7-mile delivery that ends next to a busy restaurant strip and a 7-mile delivery that strands you at the edge of the map are not the same offer. This calculator handles that honestly: a drop-off in the sticks doesn't make the route cheaper — it adds reposition miles (and their time) to the cost side. Miles you actually drive always count; a good destination is valuable because it makes the next offer come sooner, not because this one becomes free.
Train the gut, then trust it
Nobody does arithmetic in a 50-second window. The workflow that works: set your profile once, screenshot your Decline Sheet, and use the live calculator between offers and after the shift — punch in the one you just declined and see whether you were right. The history list keeps your last ten so you can watch your instincts calibrate.