Sport Tools

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Twenty-seven calculators for what you did and what it predicts

Running first, because it is the sport with the most arithmetic in it: time, distance and pace where any two give the third; a race prediction by two formulas that disagree, because the spread between them is the honest answer; a pace band that adds up to the target whatever the strategy; five training paces from one recent race, each with what it is for; what a hill costs and a descent gives back; a swim as a time per hundred; and how far each pair of shoes has gone.

Then the bicycle — seven power zones from a threshold, every combination of chainring and sprocket with its development and its speed, and a frame size in the unit the frame is actually sold in. Then the gym: a step goal built up week by week, a total scored by Wilks, DOTS and IPF points at once because they rank differently, what to put on each side of the bar found by an exact search, and a week of training built from six movement patterns.

Then the things that get scored and organised: a golf handicap index from a season with the published short-season rule, ten frames of bowling with their bonuses, every way to finish what is left on a dartboard, a seeded knockout draw, a fixture list where every pair meets once and the sides alternate, and a league table under two or three points for a win. Last, out of doors — Naismith with Langmuir's correction, air consumption, climbing grades, line capacity and the room a pool table needs — and two tools about a price rather than a performance.

Running

Running pace
Time, distance and pace: any two of them give the third, with a table of splits

Race time predictor
What a result at one distance says about another, by two formulas that disagree

Pace band
A target time spent across a race, split by split, evenly or not

Training paces
Five paces from one recent race, each with what it is for

Hill-adjusted pace
What a climb costs and a descent gives back, and the flat pace it is worth

Swim pace
A swim as a time per hundred, per length, and at every pool distance

Shoe mileage
How far each pair has gone and how much is left, with the life a rule of thumb

Cycling

Power zones
The seven zones from a threshold power, and the watts per kilogram behind them

Gear ratios
Every combination of chainring and sprocket, with its development and its speed

Bike size
A frame size and a saddle height from an inside leg, in what the frame is sold in

Training

Step goal
A daily step count built up week by week, with what it comes to in distance and time

Lifting score
A total scored by Wilks, DOTS and IPF points at once, because they rank differently

Plate loading
What to put on each side, searched exactly rather than greedily

Workout plan
A week built from six movement patterns, with the equipment there is

Scoring a game

Golf handicap
An index from a season of rounds, and the handicap you play off on a given course

Bowling score
Ten frames scored with their bonuses, and a running total after each

Darts checkout
Every way to finish what is left, shortest first, and the scores that have none

Running a competition

Round robin
Every entrant against every other, once, with the sides alternating

League table
A table from a season of results, with two points for a win or three

Out of doors

Hiking time
Naismith's rule with Langmuir's correction, and what the descent is really worth

Air consumption
What a dive says about a diver's breathing rate at the surface — not a dive plan

Climbing grades
One route in every scale that names it, and why they are not equivalents

Line capacity
How much line a spool holds when the diameter changes, and how much backing

Table room size
How big a room a table and a cue need, which is bigger than the cue

Odds

Odds converter
The same price decimal, fractional and American, with the margin a market carries

Parlay
Several bets multiplied together, and how the margin compounds along with them

Questions

Why is there no timer here?
Because a tool on this site is a function from one text to one result, and a rest timer, an interval timer, a scoreboard and a live match tracker are all *running interfaces*: a clock, a display, an undo stack. Four tools from the group are missing for that one reason, and this is where they are named rather than left for you to look for.
Which lifting formula is the right one?
None of them is, which is why all three are shown. Wilks, DOTS and IPF points were fitted separately and rank light and heavy lifters differently, so a tool that printed one of them would be picking a winner. All three refuse outside forty to two hundred kilograms, where the polynomials turn back on themselves and a very light lifter comes out the strongest person alive.
Why does the round-robin scheduler bother about home and away?
Because the circle method every hand-rolled scheduler uses gives one entrant the same side every single week, and taking the side from the round plus the seat — which looks like the fix — does not fix it: an entrant advances one seat a round, so the parity never changes. There is a test named after the claim.
Is anything I type uploaded?
No. The tools are compiled to WebAssembly and run inside the browser tab. Nothing you type is sent to a server, and you can watch your browser's network panel while you use one to see that nothing leaves the page.