Cardio Standards & Race Time Calculators
Cardio progress gets vague fast unless you measure it properly. This page brings together the core FITTUX cardio calculators so you can convert pace into time, time into pace, estimate fitness test performance, and build targets you can actually hold under fatigue.
Random effort feels hard. Structured pacing gets results. Use these tools to understand where you stand, from race times to beep test scores, and what to chase next.
1 Mile Pace Calculator & Run Time Predictor
Use the 1 mile pace calculator to calculate mile time from a recent effort, compare your result against realistic running standards, and estimate your 5K and 10K potential. This 1 mile run calculator helps you understand where your speed, pacing and fitness level currently stand.
Go to 1 Mile Calculator5K Time & Pace Calculator
Use this 5K time calculator to calculate your predicted 5K finish time, convert pace into race performance, work out accurate kilometre and mile splits, compare your results against realistic 5K running standards, and see how your current 5K time ranks against other runners.
Go to 5K Calculator10K Pace & Race Time Calculator
Use this 10K race time calculator to predict your 10K finish time from pace, estimate your potential 10K performance from a recent 5K race, calculate kilometre and mile splits, and see how your 10K running time compares against realistic standards for runners of all ability levels.
Go to 10K CalculatorHalf Marathon Time & Pace Calculator
Use this half marathon calculator to predict your half marathon finish time, convert pace into race performance, calculate 5K split checkpoints, estimate your potential result from a recent 5K or 10K race, and see how your half marathon time compares against realistic running standards.
Go to Half Marathon CalculatorMarathon Pace & Time Calculator
Use the marathon pace calculator to convert pace into finish time, calculate splits per kilometre, and run a marathon time predictor from a recent 5K, 10K or half marathon. This marathon time calculator from pace helps UK runners turn shorter race data into realistic 42.2km targets.
Go to Marathon CalculatorBeep Test Calculator (Bleep Test, MSFT & VO2 Max)
Use the beep test calculator to convert your level and shuttle into an estimated VO2 max, total distance, and top speed. Whether you call it the bleep test, multi stage fitness test or MSFT, this tool helps you understand your score, compare against beep test norms, and see where you stand by age.
Go to Beep Test CalculatorCooper Test Calculator (12 Minute Run & Score Guide)
Use the Cooper test calculator to estimate your VO2 max from the distance you run in 12 minutes. Understand your Cooper test score, compare your results against standard Cooper test norms, and see how your 12 minute run reflects your aerobic fitness.
Go to Cooper Test CalculatorVO2 Max Calculator (5K, Mile, Cooper Test & Beep Test)
Use the VO2 max calculator to estimate your aerobic fitness from a recent 5K, mile run, 2.4 km run, Cooper test or beep test. This tool helps you understand your VO2 max score, compare fitness levels, and connect race or fitness test performance to real endurance capacity.
Go to VO2 Max CalculatorHeart Rate Zone Calculator (Running, Zone 2 & Training Ranges)
Use the heart rate zone calculator to find your training ranges, understand the 5 heart rate zones, and see where your Zone 2, steady cardio and threshold efforts should sit. Whether you are using it for running or general cardio, this tool helps you control intensity, track heart rate zone bpm, and train with more structure instead of guesswork.
Go to Heart Rate Zone CalculatorStair Stepper Calories Burned Calculator
Use this stepper calories calculator to calculate calories burned on a stepper machine, estimate energy expenditure from total steps, work out how many stepper steps you need to lose weight, and see how your workout compares with realistic fitness and weight-loss goals.
Go to Stepper CalculatorSkiErg Pace Calculator (HYROX 1,000m Split & Watts)
Use this SkiErg calculator to convert SkiErg watts into a 500m split pace, estimate finish times for 500m, 1,000m and longer distances, plan race strategy, and compare your SkiErg performance against realistic standards for beginner, intermediate, advanced and elite athletes.
Go to SkiErg CalculatorHYROX Finish Time Calculator
Use this HYROX finish time calculator to estimate your race time from running pace, station splits and transition times. Predict realistic HYROX finish times, compare race pacing strategies, calculate target finish times and see how your performance compares against typical HYROX standards.
Go to HYROX Finish Time CalculatorHow to Use These Properly
Use a recent effort that reflects your current fitness. If your 5K time came from a crowded start or a windy course, treat it as a reference, not a verdict. For pacing work, aim for even splits first. Most “bad cardio days” are pacing mistakes, not a lack of fitness.
If you are using fitness tests like the beep test, focus on consistency rather than chasing one-off scores. Your level reflects pacing, control and how well you handle fatigue, not just raw effort. Use it as a benchmark you can repeat and improve over time.
Whether you are working from race times or beep test scores, the goal is the same: build repeatable performance. Lock in pacing you can sustain, track progress honestly, and let your numbers move as your fitness improves.