Hiking elevation-adjusted itinerary calculator

Calculate modeled walking minutes by leg, rounded up separately and arrival timestamp before each after-arrival break with your own figures.

Your numbers

Use the units shown. Results update as you change valid inputs.

Use modeled walking minutes by leg, rounded up separately and arrival timestamp before each after-arrival break to compare changes to your inputs. The method and limits below explain the scope.

Examples

Examples

Try the starting example

Legs: ID, level-equivalent distance km, ascent m, descent m, break after arrival whole minutes
L1,5,400,100,10 L2,3,100,300,5
Supplied level minutes per km
12
Supplied added minutes per 100 m ascent
10
Supplied added minutes per 100 m descent
2
Start, fixed-offset YYYY-MM-DDTHH:MM
2026-10-20T09:00
Modeled walking minutes by leg, rounded up separately
L1: 102; L2: 52
Arrival timestamp before each after-arrival break
L1: 2026-10-20T10:42; L2: 2026-10-20T11:44
Finish timestamp including final supplied break
2026-10-20T11:49
Total modeled walking minutes
154
Total supplied break minutes
15
Total modeled elapsed minutes
169

Try another scenario

Legs: ID, level-equivalent distance km, ascent m, descent m, break after arrival whole minutes
L1,5,400,100,10 L2,3,100,300,5
Supplied level minutes per km
12
Supplied added minutes per 100 m ascent
5
Supplied added minutes per 100 m descent
2
Start, fixed-offset YYYY-MM-DDTHH:MM
2026-10-20T09:00
Modeled walking minutes by leg, rounded up separately
L1: 82; L2: 47
Arrival timestamp before each after-arrival break
L1: 2026-10-20T10:22; L2: 2026-10-20T11:19
Finish timestamp including final supplied break
2026-10-20T11:24
Total modeled walking minutes
129
Total supplied break minutes
15
Total modeled elapsed minutes
144
Calculation method

Calculation method

Modeled walking minutes by leg, rounded up separately

Ceil(distance×level rate+ascent×ascent rate/100+descent×descent rate/100), using exact decimal fractions before integer-minute rounding.

Arrival timestamp before each after-arrival break

Start each leg after the previous leg’s supplied break; add that leg’s rounded walking minutes.

Finish timestamp including final supplied break

Final arrival plus its explicit after-arrival break.

Total modeled walking minutes

Sum rounded leg walking minutes.

Total supplied break minutes

Sum all after-arrival breaks, including the last one.

Total modeled elapsed minutes

Walking+break minutes.

Symbols and units
a
Legs: ID, level-equivalent distance km, ascent m, descent m, break after arrival whole minutes
b
Supplied level minutes per km
c
Supplied added minutes per 100 m ascent
d
Supplied added minutes per 100 m descent
e
Start, fixed-offset YYYY-MM-DDTHH:MM

Use the units shown. A list keeps the order in which you enter its values. The symbol ^ means “raised to the power of”.

Assumptions & limits

Assumptions & limits

  • A supplied additive pace scenario, not Naismith’s rule, a calibrated trail forecast or navigation advice. Terrain, fatigue, weather and actual conditions are not inferred; timestamps share one fixed offset.
Are these inputs private?

These calculations run in your browser. A shared link contains the values you choose to share. Only questions submitted to the separate AI finder are sent to OpenAI.

Further reading

OpenStax: ratios and rates; all itinerary rates, limits and scenario rules are supplied inputs ↗

Background reading; this does not imply endorsement or independent review of SumFizz.

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