# Running Pace Calculator (Distance / Time / Pace) Solve for pace, finish time or distance given the other two. Enter a known distance and either a finish time or a pace, and get the missing value plus speed and optional Riegel race predictions. > Canonical page: https://elysiatools.com/en/tools/running-pace-calculator - **Category:** Health - **Keywords:** running pace calculator, pace calculator, running pace, finish time, riegel formula, race prediction, marathon pace, km per hour ## Overview The Running Pace Calculator helps runners calculate their pace, finish time, or distance by entering any two of these variables. It supports both kilometers and miles, calculates average running speed, and provides race time predictions for distances like 5K, 10K, half marathons, and full marathons using the Riegel formula. ## Inputs - **What to solve for** (select) - **Distance** (number): e.g. 10 - **Distance unit** (select) - **Finish time (HH:MM:SS)** (text): e.g. 55:00 or 1:30:00 - **Pace (MM:SS per unit)** (text): e.g. 5:30 - **Predict race time** (select) - **Decimal places** (number) ## When to use - When planning a race strategy and needing to determine the exact pace required to hit a target finish time. - When analyzing training runs to calculate average pace and speed from a completed distance and elapsed time. - When predicting potential race finish times for longer distances based on a recent shorter race performance. ## How it works - Select the variable you want to solve for: Pace, Time, or Distance. - Input the two known values along with your preferred distance unit (kilometers or miles). - Choose an optional target race distance to generate a finish time prediction using the Riegel formula. - Click calculate to view the solved metric, average speed, and predicted race times. ## Use cases - Calculating the exact pace needed to complete a 10K run in under 50 minutes. - Determining the total distance covered during a 45-minute run at a steady 6:00/km pace. - Estimating a marathon finish time based on a runner's recent half-marathon time. ## Frequently asked questions ### How does the calculator predict race times? It uses the Riegel formula, which estimates race times for different distances based on a known performance at a specific distance. ### Can I calculate pace in both miles and kilometers? Yes, you can select either kilometers (km) or miles (mi) as your distance unit. ### What time formats are supported? You can enter times in HH:MM:SS format, such as 55:00 for fifty-five minutes or 1:30:00 for one hour and thirty minutes. ### What variables can I solve for? You can solve for Pace (using distance and time), Time (using distance and pace), or Distance (using time and pace). ### Does the calculator show running speed? Yes, the output displays your average running speed in kilometers per hour or miles per hour alongside the calculated pace. ## Related tools - [Blood Alcohol Content (BAC) Estimator](https://elysiatools.com/en/tools/bac-calculator): Estimate your BAC from sex, weight, drinks and time using the Widmark formula. Returns g/dL and ‰, predicts sober time, and flags the impairment tier and legal driving limits. - [Carrying Capacity Estimator (Fit K from Time-Series Data)](https://elysiatools.com/en/tools/carrying-capacity-estimator): Least-squares logistic fit of K, r, t₀ from `time, population` observations, with fitted curve, residuals, and plateau warnings. - [Fetal Development Timeline (by Gestational Week)](https://elysiatools.com/en/tools/fetal-development-timeline): See week-by-week fetal development from conception to birth (40 weeks). Enter your LMP date or a known gestational age and the tool highlights the current week with size, weight and milestones. - [Hydration Sweat Rate Calculator](https://elysiatools.com/en/tools/hydration-sweat-rate-calculator): Calculate sweat rate, net fluid loss, and a recommended hourly drinking range from pre/post body weight, fluid intake, urine volume, and session duration. - [Macro Calculator (Carbs / Protein / Fat Split)](https://elysiatools.com/en/tools/macro-calculator): Convert a daily calorie target into grams of carbohydrate, protein and fat. Pick a preset split — balanced (50/30/20), low-carb (35/40/25), keto (10/20/70) or high-protein (40/35/25) — or define your own percentages. - [Protein Intake Calculator (by Body Weight & Activity)](https://elysiatools.com/en/tools/protein-intake-calculator): Estimate your daily protein target in grams from body weight and activity level. Coefficients (g per kg bodyweight) follow the ISSN 2017 position stand and the Morton et al. 2018 meta-analysis. - [Sleep Calculator (90-Minute Cycles)](https://elysiatools.com/en/tools/sleep-calculator): Find the best bedtime or wake time based on the brains 90-minute sleep-cycle rhythm. Enter a target wake time and get recommended bedtimes, or enter a bedtime to project forward. - [TCM Pulse & Tongue — Zhang Zhongjing Six-Meridian Decoder](https://elysiatools.com/en/tools/tcm-pulse-and-tongue-pattern-zhang-zhongjing-decoder): Project pulse (floating/deep/slow/rapid…) and tongue (pale/red/purple/coating) signs onto the Shanghan Lun six-meridian (六经辨证) templates with classical formula correspondence ## Samples - [Time Zone Workflow Scheduler ICS Samples](https://elysiatools.com/en/samples/time-zone-workflow-scheduler-ics-samples): ICS files generated in the same structure returned by the Time Zone Workflow Scheduler, with multiple VEVENT meeting candidates exported from overlap windows - [WebRTC Real-Time Communication Samples](https://elysiatools.com/en/samples/webrtc-samples): Comprehensive WebRTC samples for peer-to-peer audio/video communication, data channels, screen sharing, and signaling server implementation - [Web Image Processing Python Samples](https://elysiatools.com/en/samples/web-image-processing-python): Web Python image processing examples using PIL/Pillow including reading, saving, resizing, and format conversion - [Android Date & Time Java Samples](https://elysiatools.com/en/samples/android-datetime-java): Android Java date and time examples including getting current time, formatting dates, and parsing date strings ## Related content - [Health Tools](https://elysiatools.com/en/hubs/health-utility): Explore 29 health tools for utility workflows and compare closely related utilities quickly. - [Meditation, Sleep, and Relaxation Tools](https://elysiatools.com/en/hubs/meditation-sleep-relaxation): Compare guided meditation, breathing routines, PMR, sleep-cycle planning, stress self-checks, and supporting audio tools in one hub for calmer daily routines. - [Endurance Training Pace, Heart Rate, and Effort Tools](https://elysiatools.com/en/hubs/endurance-training-metrics): Compare pace calculators, heart-rate zone tools, VO2 max estimates, cycling power, calorie burn, and training-load metrics in one hub for running, cycling, swimming, and triathlon planning. - [Nutrition, Body Composition, and Sleep Calculators](https://elysiatools.com/en/hubs/nutrition-body-composition-sleep-calculators): Calculate daily macros, protein targets, lean body mass, TDEE and BMR, hydration and sweat rate, walking calorie burn, and optimal sleep-wake times with step-by-step body-metric tools.