Running Pace & Zone Calculator

Calculate finish times. Train effectively with accurate pace zones. Do more running and less math.

As a runner myself I wanted the "Swiss army knife" of running calculators. I wanted to switch between miles and kilometres. I wanted to figure out what my pace zones are across different coaching systems. And I wanted to plan my race paces with insight into what the metabolic cost would be.

It's the little things that are so annoying... you run in min/km and then step onto a treadmill in a hotel that wants mph... This app fixes this and every other running math problem I could think of.

If you take your running seriously you will want this app on your phone. It's not a run tracker or workout planner; this app does all the math that runners need at their fingertips.

For runners who'd rather run than do maths.

— NEW: QUICK ZONE SETUP —

One benchmark run time in. Your training zones out - immediately. No spreadsheets, no
manual conversions, no digging through six layers of settings in an
app that was built to do something else. But not just any zones, you decide which coaching system you are using and this app produces your pace zones aligned to that system.

Your zones are on the first screen, where they belong.

— NEW: THREE TRAINING METHODOLOGIES —

Zones are only useful if they match the plan you're following. Most
calculators pick one model and make you live with it. This one asks
which model you train under, then rebuilds every zone around it:

- 80/20 — the large majority of your volume genuinely easy, a
controlled minority genuinely hard
- Daniels-style — zones derived from a single fitness score based on
your current race performance
- Polarised — a hard separation between easy and hard, with nothing
stranded in the grey middle

Switch between them any time. See exactly what the same benchmark result
produces under each.

— THE CALCULATOR —

The core tool, refined since 2023:

- Solve for pace, time or distance — enter any two, get the third
- Estimate race or training session times
- Compare any pace against your zones
- Convert min/km to min/mile and back, so you speak the same
language as your running club
- Splits for any distance you enter

— NEW: REBUILT INTERFACE —

Version 2.0 is a full visual rebuild. Bigger figures, clearer
hierarchy, faster input. Readable at a glance between reps.

— WHO IT'S FOR —

First-timers working towards a 5K. Club runners chasing a parkrun PB.
Marathoners deep in a block who need to know what "easy" means today.

If you've ever finished a session unsure whether you ran it at the
right effort, this is the fix.

— NOT A TRACKING APP —

There are excellent apps for logging runs and building plans. This
isn't one of them, and doesn't try to be. It opens straight to the
number you need, works without waiting on a sync, and doesn't ask you
to create an account before it will answer a question.

No ads. No subscription. No sign-up. One low one-time fee, updated
and improved regularly.

Questions or requests: contact via my human manned Support URL !