Running calculators
They all run on a single screen, need no account and keep the result in the address bar, so you can save it or send it to a training partner.
This page lists 18 free calculators: 11 running and trail tools, 2 cycling tools, 1 swimming tool and 4 general training tools. Everything runs in the browser and every result travels as a link in the address bar.
These are general ranges and assume normal conditions. Trail, heat, elevation gain, wind and technical ground all make the real time longer.
Частые вопросы
(7)
Are the calculators free?
Yes, all of them. No account, no download; every tool opens in the browser and works right away.
Is my data stored anywhere?
No. Everything is calculated in your browser and no input is sent to a server. The only state lives in the page address.
How do I share a result?
Copy the link from the address bar. Your inputs travel with the link, so whoever opens it sees the same result.
Which tool is for what?
Road running: pace, race time prediction and splits. Trail and ultra: grade adjusted pace, trail effort and the cutoff plan. Cycling: power zones and nutrition. Swimming, HYROX and heart rate zones each have their own tool.
What are the calculations based on?
On widely used methods: Riegel for race time prediction, VDOT tables for training paces, the Minetti cost curve for grade adjusted pace and Karvonen for heart rate zones. Each tool page explains its method and names the source.
Do the tools connect to the race calendar?
Yes. Pick a listed race course and the distance and climb fill in on their own. If the site has a checkpoint table for that race, the cutoff plan also loads the checkpoints and time limits.
Is there a Turkish version?
Yes, every calculator is also published in Turkish under /araclar.