Endure Weekly
Free · No email gate Calculators

Calculators built for the long miles.

Three working calculators today, with two more on the way. Numbers that respect the kilometers you've already put in. No email-gates, no upsells — just math the general-running sites don't bother with.

  1. № 01

    Vert Calculator

    Enter your distance, total elevation gain, and a goal flat pace — get an honest finish time, vert-per-mile, and an equivalent flat-mile pace.

    For: pacing planning · finish-time estimation
    →
  2. № 02

    Drop-Bag Planner

    Race distance, drop-bag count, weather, night running. We print a per-bag checklist with calories, hydration, layers, and the small things that quietly save hundred-milers.

    For: race-week prep · post-recovery review
    →
  3. № 03

    Ultra-Pace Calculator

    Take your marathon time, factor in your race distance and vert. Output is a realistic finish-time estimate, average pace, and slowdown vs marathon.

    For: goal-setting · sub-24 reality check
    →
  4. № 04

    Splits Calculator Coming soon

    Punch in race distance, vert profile, target finish time, and we'll print custom splits for every aid station. Honest pacing, every mile.

    For: race-day pace cards · crew sheets
  5. № 05

    Ultra Fueling Calculator Coming soon

    By body weight, expected race duration, and weather: a working calorie-and-sodium clock. Hour-by-hour fueling plan with real food + gel + electrolyte split.

    For: fueling strategy · sodium math

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