Driving Distance and Time Calculator
Estimate driving time between two places from distance, road type and average speed.
Formula and sources updated · Data sources · 1View algorithm, constants and default inputs (JSON)
About this calculator
Enter the miles and average speed for each of three road segments, plus planned stops. The estimate uses miles and mph throughout; it does not model traffic, route selection, or changing conditions.
Worked example
calculated with the default values below
Motorway / major-road distance 200 mi · Average speed on this segment 62 mph · Other-road distance 80 mi · Average speed on this segment 42 mph · Urban-road distance 20 mi · Average speed on this segment 20 mph · Number of stops 2 · Minutes lost per stop 10 min Total distance 300 mi · Motorway time 3.23 h · A-road time 1.90 h · City time 1.00 h · Total trip time 6.46 h · Overall average speed 46.4 mph
Method and assumptions
v_avg = Σᵢ Dᵢ ÷ (Σᵢ (Dᵢ ÷ vᵢ) + n × m ÷ 60), i ∈ {1, 2, 3} Total time = motorway + other-road + city driving time + planned stops. Overall average speed includes stop time. Speeds and distances use mph and miles. Enter the miles and average speed for each of three road segments, plus planned stops. The estimate uses miles and mph throughout; it does not model traffic, route selection, or changing conditions. Use the cited guidance and your own measurements, bills or product specifications to choose inputs. Sample defaults are not current local data.
Data sources
Use the cited guidance and your own measurements, bills or product specifications to choose inputs. Sample defaults are not current local data.
Disclaimer
These calculators give general estimates. Sizing, pricing, availability and standards vary by brand, retailer and country, so treat the output as a starting point and confirm it against the seller's or authority's own figures.
Implementation source
This record describes the implementation used by this page. It is not independent validation. External references, when available, support only the stated formula or definition; estimates and custom rules retain their own assumptions.
Formula and variables
v_avg = Σᵢ Dᵢ ÷ (Σᵢ (Dᵢ ÷ vᵢ) + n × m ÷ 60), i ∈ {1, 2, 3}
- Dᵢ
- Segment distance (mi)
- vᵢ
- Entered segment average speed (mph)
- n
- Number of stops
- m
- Minutes per stop
- v_avg
- Overall average speed including stops
Total time = motorway + other-road + city driving time + planned stops. Overall average speed includes stop time. Speeds and distances use mph and miles.
Frequently asked questions
What does the overall average speed include?
It divides total entered miles by segment driving time plus the entered stop time. Segment speeds are assumptions you provide; traffic, route selection, and other delays are not included. The page uses miles and mph.
Which inputs and limits apply to Driving Distance and Time Calculator?
Use the units shown beside each field. These are form limits, not recommended settings. Motorway / major-road distance: 0–10,000 mi; Average speed on this segment: 10–90 mph; Other-road distance: 0–10,000 mi; Average speed on this segment: 10–70 mph; Urban-road distance: 0–2,000 mi; Average speed on this segment: 5–45 mph; Number of stops: 0–50; Minutes lost per stop: 0–120 min v_avg = Σᵢ Dᵢ ÷ (Σᵢ (Dᵢ ÷ vᵢ) + n × m ÷ 60), i ∈ {1, 2, 3} Total time = motorway + other-road + city driving time + planned stops. Overall average speed includes stop time. Speeds and distances use mph and miles. Enter the miles and average speed for each of three road segments, plus planned stops. The estimate uses miles and mph throughout; it does not model traffic, route selection, or changing conditions. Use the cited guidance and your own measurements, bills or product specifications to choose inputs. Sample defaults are not current local data.
What is a complete worked example for Motorway / major-road distance = 200 mi; Average speed on this segment = 62 mph?
Inputs: Motorway / major-road distance = 200 mi; Average speed on this segment = 62 mph; Other-road distance = 80 mi; Average speed on this segment = 42 mph; Urban-road distance = 20 mi; Average speed on this segment = 20 mph; Number of stops = 2; Minutes lost per stop = 10 min. Calculation: v_avg = Σᵢ Dᵢ ÷ (Σᵢ (Dᵢ ÷ vᵢ) + n × m ÷ 60), i ∈ {1, 2, 3}. Results: Total distance = 300 mi; Motorway time = 3.23 h; A-road time = 1.90 h; City time = 1.00 h; Total trip time = 6.46 h; Overall average speed = 46.4 mph.