Run fast.
Math later.
PACECALC · 22 FREE TOOLS
Pace, time, distance, splits. Calculators for runners and triathletes. No accounts. No ads. No tracking.
- EDITORIAL
- OPEN
- iOS + WEB
01 / CORE
Pace, time, distance
The basics. Every other tool starts here. Solve any of the three from the other two.
6 tools
- Pace Calculator Solve pace ↔ time ↔ distance with even-split or negative-split tables.
- Marathon Pace Pace, splits, and finish-time table for the marathon distance (42.195 km / 26.2 mi).
- Half Marathon Pace Pace, splits, and finish-time table for the half marathon (21.0975 km / 13.1 mi).
- VDOT Calculator — Daniels Estimate your VDOT score from a recent race.
- Race Predictor — Riegel Project times across distances using Riegel formula.
- Pace Converter Convert between min/km, min/mi, mph, kph.
02 / TRAINING
Build the engine
Workouts and zones derived from your fitness. The output of these tools is your training week.
5 tools
- Training Paces Easy, marathon, threshold, interval, repetition zones.
- Intervals Track-workout splits and Yasso 800s.
- Banger Workouts Coach-prescribed sessions for 5K to marathon.
- HR Zones — Karvonen Heart rate training zones from max HR or age.
- Zone 2 Running — Maffetone Aerobic-base intensity — 60–70 % max HR plus matching pace from a recent race.
03 / RACE-DAY
Execute the plan
Tools you actually use the morning of. Splits, fueling, run/walk strategy, course-specific calculators.
3 tools
04 / PERFORMANCE
Compare and qualify
Where you stand. Age-graded scoring, BQ checking, race-to-race comparison.
3 tools
05 / CONDITIONS
When the world fights you
Adjust for heat, altitude, weight, treadmill belt. The "why am I slower today" tools.
5 tools
06 / BY GOAL
Goal pacing pages
Splits and training prereqs for every common time goal — sub-3, sub-4, sub-1:30, sub-20.
16 tools
07 / REFERENCE
Charts & comparisons
Bookmarks and cheat-sheets. Static lookups when you don't want to do math.
7 tools
PACECALC · IOS
Designed to be posted. Now on the App Store.