Free tools

Free tools for runners and pilgrims

Calculators and references for pacing, racing, fuelling and training — plus Camino de Santiago stage planning, budgets, and packing lists. Simple, fast, and free — no sign-up, no catch.

Pace

Pace CalculatorTurn any distance and finish time into your pace per kilometre and per mile.Pace ChartA reference table of paces and the 5K, 10K, half and full marathon times they produce.Finish Time CalculatorSet a goal pace and distance to see the finish time you are on track for.

Racing

Pace Band GeneratorTurn a goal time into a printable band of per-split target times for race day.Race Time PredictorPredict your time at a new distance from a recent race result, using the Riegel formula.Marathon Time PredictorPredict your marathon finish time from a recent 5K, 10K or half marathon.Marathon Heat CalculatorAdjust your goal marathon time for race-day heat and see the pace the weather really allows.Triathlon Time CalculatorAdd up swim, bike, run and both transitions into a finish time, with cutoffs checked.Grade Adjusted PaceSee what a hilly pace is worth on the flat, or the pace to run a hill at the same effort.Ultra Split PlannerTurn a goal time into arrival times at every aid station, with climbs and cutoffs counted.Age Grade CalculatorScore a race against the world best for your age and sex, and see what it is worth at open-class age.Boston Qualifying CalculatorCheck your Boston qualifying standard, how far off you are, and what the cut-off actually demands.

Converters

Miles ↔ Km ConverterConvert miles to kilometres and back, with the common race distances built in.

Fuelling

Gel & Fuel CalculatorWork out how many gels and how many grams of carbs to take on a long run or race.Sodium & Electrolyte CalculatorWork out how much sodium you sweat out on a long run or race, and how many salt capsules or electrolyte servings to carry.Hydration CalculatorWork out how much to drink per hour on a long run or race, from your sweat rate and body weight.Caffeine CalculatorWork out how much caffeine to take before and during a race, and how many gels, tablets or coffees that is.Carb Loading CalculatorWork out how many grams of carbohydrate to eat per day and per meal in the days before a long race.

Training

Training Pace CalculatorTurn a recent race result into the five paces your training should actually run at.Taper CalculatorA week-by-week taper from your peak week: how far to run, how long the long run, and when.Race Recovery CalculatorWork out how long to rest, how long to run easy, and when it is safe to race hard again.Heart Rate ZonesFind your five training zones from your age, or from your measured max and resting heart rate.Calories Burned RunningEstimate the calories you burn on a run from your distance, time and body weight.Yearly Running GoalBreak a yearly distance goal into weekly targets and see whether you’re on track.Training Start DateFind the date to start training, counting back from race day by your plan length.Training Plan GeneratorGenerate a personalized 5K–marathon training plan in the style of Pfitzinger, Hanson, Daniels, Higdon or Galloway, with PDF, Excel and calendar export.VO₂ Max CalculatorEstimate your VO₂ max from a recent race, a 12-minute Cooper test, or your heart rate.

Printables

Finisher CertificateA printable finisher certificate for any race, with your time and pace on it.Marathon Sign GeneratorPick or write a race-day sign, set huge and ready to print or hold up on your phone.

Camino

Camino Stage PlannerTurn a route and a daily distance into a day-by-day Camino itinerary.Which Camino Fits My Days?See where to start on each route with the days you actually have.Camino Budget CalculatorAn honest low-to-high estimate of what your Camino will cost.Walking Time CalculatorHow long a walk really takes once the hills and the pack join in.Camino Packing ListA season-aware checklist of what actually earns its place in the pack.