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Tent Footprint Size Calculator

Work out the finished and cut size of a DIY tent footprint, tucked slightly under the tent edges.

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Backpacking Food Weight CalculatorEstimate how much your trail food will weigh from trip length, calories and food calorie density, with a safety buffer.Bike Gear Ratio CalculatorChainring 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.Climbing Grade ConverterConvert climbing grades between YDS, French, UIAA, British trad, Ewbank and Saxon for roped routes, and between the V-scale and Fontainebleau for bouldering.Gym vs Home Workout Cost CalculatorTotal cost of a gym membership vs a home setup over years, break-even month and cost per workout.Hiking Time Calculator (Naismith)Estimate hiking time from distance and elevation using Naismith's rule with a Langmuir descent correction.Pace Zone CalculatorTurn your threshold pace into five training zones — recovery, easy, threshold, interval and repetition.Triathlon Pace CalculatorSwim, bike and run splits with per-segment pace and total time, with preset race distances.Pace ConverterConvert between min/km, min/mile, km/h and mph.

Tent Footprint Size Calculator works straight from this page — free, instant, nothing to install. It sits under Running & endurance in our catalogue, alongside Backpacking Food Weight 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 is Tent Footprint Size Calculator?

Work out the finished and cut size of a DIY tent footprint, tucked slightly under the tent edges.

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.

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 →
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.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.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.ExplainerTraining Zones Are a Model, Not a MeasurementEvery zone scheme is a set of percentages of some anchor, and the anchor is the whole argument. One runner, three published schemes: the ceiling of easy aerobic work lands at 131, 141 or 150 bpm. And if the anchor is 220 minus age, a two-standard-deviation error moves one boundary by 30 bpm.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.