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Backpacking Food Weight Calculator

Estimate how much your trail food will weigh from trip length, calories and food calorie density, with a safety buffer.

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Backpacking Food Weight Calculator works straight from this page — free, instant, nothing to install. It sits under Running & endurance in our catalogue, alongside Power-to-weight ratio calculator and Bike Gear Ratio Calculator.

How to use it

  1. Open the tool — no signup or install needed.
  2. Enter your input or adjust the available options.
  3. Get your result instantly, then copy or download it.

Frequently asked questions

What does Backpacking Food Weight Calculator do?

Estimate how much your trail food will weigh from trip length, calories and food calorie density, with a safety buffer.

When would I actually use this?

Preparing a race: the pace a target time needs, the splits to hold it, and the training zones that sit under it — on foot, and equally on a bike or in a pool, where the same session is measured in watts or in a hundred-metre split instead.

What is the most common mistake?

Scaling a time linearly to a longer distance. A marathon is not two half-marathons; race predictors use an exponent around 1.06 precisely because fatigue is not proportional.

How is Backpacking Food Weight Calculator different from Power-to-weight ratio calculator?

They sit next to each other but answer different questions: Power-to-weight ratio calculator is the one to open when you need it to compute your cycling power-to-weight ratio in watts per kilogram. Pick whichever matches what you're starting from — both are free.

Is there a tool for the next step?

Bike Gear Ratio Calculator is the closest one after this: Chainring and cog teeth to gear ratio, gear inches, metres of development, Sheldon Brown gain ratio and speed at your cadence, with a full gear chart.

What else is worth having open alongside it?

Climbing Grade Converter and Gym vs Home Workout Cost Calculator — they come up in the same task often enough to be worth a second tab.

Where do the figures come from?

Pace arithmetic is exact. Race predictions follow Riegel's formula, which assumes training matched to the longer distance — without it the prediction is optimistic.

Further reading

All guides →
GuideHow Much Food to Carry: The Number That Matters Is Calories per GramA published walking-energetics equation turns body mass, pack weight, speed and terrain into a daily calorie figure. But calories are not what you carry — mass is. Work the arithmetic and the planning number stops being calories per day and becomes calories per ounce.ExplainerTent Footprints, Floor Area and the Numbers That Do Not Mean What You ThinkThere is a standard behind two-person, and its berth is 24 inches wide. Divide real floor plans by their occupants, compare the result with a sleeping pad, then compute how much of a quoted peak height actually exists: in a straight-sided A-frame, sitting height covers 18 per cent of the floor width.ExplainerSleeping Bag Temperature Ratings, and What Comfort Actually MeansThe numbers on a sleeping bag come from ISO 23537-1, which publishes four figures and lets retailers print one. The standard measures a heated manikin's heat loss — so it measures insulation, and its own test mat is R 4.8. Put the same bag on an R 1.5 pad and the heat leaving through your back more than triples.GuideHiking Pace: Naismith's Rule and the Corrections It NeedsNaismith's 1892 rule times a route in two lines of arithmetic. It also ignores descent completely and assumes a fit walker with no pack. Here is the rule, Langmuir's fix, and Tobler's continuous alternative — whose fastest speed is on a downhill, not on the flat.ExplainerGear Inches, Development, and Why Cyclists Argue About Ratios50/11 means nothing until you attach a wheel. Gear inches and metres of development, derived and converted, a full table for a real 12-speed drivetrain, and why the gear step between two sprockets decides whether you can hold a cadence.ExplainerClimbing Grade Conversions Are Not ConversionsFrench, YDS, UIAA, V-scale and Font are ordinal scales with no underlying unit. A conversion table is a negotiated alignment between climbing communities — and published tables disagree by half a grade at the top and by four letter-grades at the bottom of the boulder scales.