Gerbil bedding is bought in litres, but tanks are measured in centimetres, and that mismatch makes shopping confusing. Buy too little and tunnels collapse halfway through the month. Buy too much and bags pile up. This free calculator turns tank floor area and bedding depth into litres per full change, plus the number of standard 60 litre bags.
What this tool does
This free gerbil bedding calculator – how much bedding per change runs entirely in your browser. Nothing you type is sent to a server, and nothing is stored online. You enter a few simple facts about your gerbils, press the button, and the result appears at once. You can change any value and run it again as often as you like. That makes it easy to test what happens when weight, count, or age changes, and to prepare good questions for your vet.
How to use it
Start with the facts you know for sure. Weigh your gerbils if you can, because a guessed weight makes the whole result less useful. Then pick the options that match your gerbils best, such as age group or count. Press the calculate button and read the result lines one by one. If a value looks surprising, check the inputs first: a wrong unit or a wrong age group is the most common cause of a strange result.
Reading your result
The first line is litres of bedding for one full change, and the second line is how many 60 litre bags that means. The maths is simple: floor area times depth, divided by 1000. Spot-cleaning between full changes uses much less, so this number is your full-change shopping amount, not your weekly use. Keep a spare bag, because a full change always uses more than you expect.
Worked example
Take a tank floor of 4000 square centimetres with 20 cm of bedding. The calculator gives 80 litres per full change, which is 2 bags of 60 litres. That second bag will not go to waste: it covers top-ups after spot-cleaning and the next partial refresh. If you raise depth to 25 cm for a bigger group, the same tank needs 100 litres, still 2 bags.
Practical tips
Mix two or three bedding materials so tunnels hold shape: wood shavings for structure, hay for binding, and paper for softness. Avoid cedar and pine shavings, which can irritate gerbil lungs, and avoid dusty bedding. At each full change, keep a handful of clean old bedding and mix it in, so the tank keeps a familiar scent and gerbils settle faster.
When to ask your vet
Book a vet visit if a gerbil sneezes often, has a runny nose, or breathes noisily after a bedding change. Dusty or scented bedding can trigger breathing problems in gerbils. Tell the vet which bedding you use, because switching to a low-dust option is often the first fix.
Common questions
Is this veterinary advice? No. This tool gives educational estimates for healthy pet gerbils. It does not diagnose illness, and it does not replace a vet, especially for sick animals or animals on medication.
How accurate is the result? It is a good starting point for most gerbils, but real needs vary with breed, body shape, weather, and daily routine. Use the result for two to four weeks, watch the trend, and then fine-tune.
What if my gerbil is very active one day and lazy the next? Feed and plan for the average week, not for a single day. Active days can take a small extra, and rest days can take a slightly smaller amount, as long as the weekly total stays near the target.
Spanish version: Calculadora de lecho para jerbos – Litros por cambio