Cycling
Bike Time & Speed Calculator
Free bike time calculator. Enter distance and average speed to see how long your ride takes, or a goal time to get the speed you need. At 30 km/h, 40 km takes 1 h 20 min, 100 km takes 3 h 20 min and 180 km takes 6 hours.
Bike
Result
Estimated finish time
1:15:00
Share your numbers
Get your result as a Story-sized image. Save it for race day, or send it to the people you train with.
Fueling for this race
At an estimated 1:15:00, plan for approximately 2 servings of HYDRAX CORE across the session (one serve per hour as a starting point), plus 1 serve of HYDRAX PRIMER 20–30 minutes before the start.
Race Kit = PRIMER + CORE. Free shipping over $95, same-day dispatch before 11am AEST weekdays.
Get the race-week notes
Fuelling notes and new tools by email, plus 20% off your first order. Unsubscribe any time.
Other calculators
Racing in Australia? Read the Gold Coast Marathon fuelling plan or the HYROX Australia fuelling guide. Long course athletes: 70.3 Sunshine Coast, 70.3 Cairns, IRONMAN Cairns and IRONMAN Western Australia.
A cycling speed and time calculator helps you plan rides, estimate arrival times, and set pacing targets for events. Whether you are commuting, training, or racing, knowing how speed, distance, and time interact is fundamental to cycling performance.
Want the answer without the maths? See how long it takes to cycle 40, 90 or 180 km at every average speed.
Average cycling speeds by category
Recreational cyclists typically average 18 to 24 km/h on flat terrain. Club-level riders hold 25 to 30 km/h. Competitive racers sit between 30 and 38 km/h, and elite cyclists exceed 40 km/h in solo efforts. In a group or peloton, drafting can reduce aerodynamic drag by 20 to 40%, allowing speeds 3 to 6 km/h higher than solo riding at the same power output. The calculator uses your expected average speed, which should account for terrain, wind, stops, and traffic.
Factors that affect cycling speed
Wind is the biggest variable. A 15 km/h headwind can reduce your average speed by 4 to 6 km/h. Elevation changes matter: climbing 500 m over 20 km adds 10 to 15 minutes compared to a flat 20 km at the same power. Road surface, tyre pressure, riding position, and even clothing all affect rolling and aerodynamic resistance. When entering your speed into the calculator, use a number that reflects realistic conditions, not your Strava PR on a perfect day with a tailwind.
How to estimate ride time
Time equals distance divided by speed. A 100 km ride at 28 km/h takes 3 hours 34 minutes. The calculator handles this instantly and converts between km/h and mph automatically. For multi-segment rides, calculate each segment separately and add them up. For events with known distances (like a 40 km time trial or a 160 km sportive), enter the distance and your target speed to see your projected finish time.
Working backwards from a target time
Switch to "Required pace for target" mode to find the speed you need. If you want to complete a 100 km sportive in under 4 hours, the calculator tells you: 25 km/h. This is powerful for goal-setting because it converts a vague ambition into a specific, measurable target. Train to hold that speed in conditions similar to race day.
Fueling for long rides
Cycling is uniquely suited to high carbohydrate intake because the bike supports your weight and GI distress is less common than in running. A high-carbohydrate fueling strategy using dual-transporter carbs lets you absorb up to 90 g per hour. For rides over 2 hours, Hydrax Core delivers 980 mg of sodium and a 2:1 maltodextrin-fructose system per serving. Take Hydrax Primer before long rides to pre-load electrolytes. Read about dual-carbohydrate transporters to understand why two carb sources absorb faster than one, and learn how much sodium you actually need to prevent the cramps that ruin the last hour of a long ride. For ultra-distance events, A practical approach to gut training is essential. And understand why osmolality matters for performance to choose the right drink concentration for your conditions.
To personalise your hydration, calculate your sweat rate here and use that number to plan fluid intake on the bike. Turn the estimate into bottle-by-bottle numbers with the Fuelling Strategy Engine, and if the ride is a race rehearsal, cross-check it against the Ironman 70.3 nutrition plan or the Ironman nutrition plan. Riders stacking back-to-back blocks often add HYDRAX CREATINE to their daily routine, and single-serve sachets travel well in a jersey pocket. Ready to stock the bidons? build your race kit.
Cycling speed & time reference
How long common cycling distances take at different average speeds.
| Distance | 20 km/h | 25 km/h | 30 km/h | 35 km/h | 40 km/h |
|---|---|---|---|---|---|
| 40 km | 2:00:00 | 1:36:00 | 1:20:00 | 1:08:34 | 1:00:00 |
| 90 km | 4:30:00 | 3:36:00 | 3:00:00 | 2:34:17 | 2:15:00 |
| 100 km | 5:00:00 | 4:00:00 | 3:20:00 | 2:51:25 | 2:30:00 |
| 160 km | 8:00:00 | 6:24:00 | 5:20:00 | 4:34:17 | 4:00:00 |
| 180 km | 9:00:00 | 7:12:00 | 6:00:00 | 5:08:34 | 4:30:00 |
Frequently asked questions
How this works
The engine is the same for every mode: time equals distance divided by pace, summed across legs. In Triathlon mode you input swim distance and pace, bike distance and speed, run distance and pace, plus T1 and T2 transitions. The calculator adds them up. In Running and Cycling modes you supply the single leg.
Switch to Required pace for target and the engine works in reverse: enter your goal finish time and it tells you the pace you need to hold. For triathlon, it assumes your swim, bike, and transitions stay as entered and solves for the required run pace.
Pace and distance can be entered in any units (km/mi, m/yd, /100m or /100yd, km/h or mph). Conversion is handled automatically.
This tool provides an educational estimate based on the inputs you provide. Real race times are affected by elevation, wind, drafting, nutrition, pacing strategy, and individual physiology. Use it as a planning aid, not a guarantee.
Disclaimer: This page is general information for healthy adult athletes and is not medical, dietetic or coaching advice. Individual carbohydrate, fluid and sodium requirements vary with body weight, sweat rate, conditions and health status. Speak with your doctor, sports physician or an accredited sports dietitian before changing your nutrition or supplement routine, rehearse any fuelling plan in training before race day, and always follow the directions and warnings on the product label.