How does tofu litter perform against clay litter?
Clay litter (10L bag weighs about 4.8–5 kg)
Traditional clay cat litter usually needs to be poured quite deep — around 5 cm — and solids are removed daily. Most guidance suggests replacing the entire tray about once a week for hygiene.
Typical lifespan (1 cat): 7–10 days per 10L bag.
Because clay is non‑clumping, urine spreads through the whole tray, meaning you throw away everything far more often.
Tofu litter (3 kg bag is roughly 5.5–6.5L)
A ~3 kg / ~6 L bag of tofu cat litter typically lasts around a month for one cat with daily scooping. It forms strong clumps, so you only remove the soiled parts rather than replacing the whole tray.
Typical lifespan (1 cat): 3–4 weeks per 3 kg bag. Some people stretch it to 4–5 weeks with regular scooping and top‑ups.
If you want to see how our plant‑based, eco‑friendly tofu litter works, you can check out our shop here:
Rough comparison (1 cat)
Real-world usage comparison (1 cat)
Litter type Depth Starting amount Typical duration
Mineral (Catsan) 5-7 cm ~4-5 kg ~7-10 days
Tofu 3-4 cm ~2-2.5 kg ~3-4 weeks
Even though the tofu bag is smaller, clumping tofu litter often lasts 3–4× longer because you only remove clumps instead of throwing everything away.
Tray Depth Difference
Mineral litter (like Catsan)
Mineral litters usually need a deeper layer:
5–7 cm depth
Tray often filled with 4–5 kg at once
Why:
Urine doesn’t form tight clumps
Liquid spreads across a wider area
Thin layers soak through and smell
So people tend to:
fill the tray deep
replace the whole tray weekly
Tofu litter
Tofu litter behaves very differently — it’s a low‑dust, biodegradable cat litter that clumps fast and stays cleaner for longer.
Typical recommendation:
3–4 cm depth
Usually 2–2.5 kg in the tray
Why:
Urine forms solid clumps quickly
Clumps stay compact
The rest of the litter stays clean
So instead of replacing everything, you:
scoop clumps daily
top up occasionally
do a full refresh every few weeks
Real‑world usage comparison (1 cat)
Real-world usage comparison (1 cat)
Litter type Depth Starting amount Typical duration
Mineral (Catsan) 5-7 cm ~4-5 kg ~7-10 days
Tofu 3-4 cm ~2-2.5 kg ~3-4 weeks
So although the bag size looks smaller, tofu litter is more efficient per kilogram.
Why this matters for PurrStainable
When people first see a 3 kg bag of tofu litter, they often assume:
“That won’t last long.”
But the real message is:
“You use about half as much litter and throw away far less.”
So the clearer comparison is:
3 kg tofu ≈ 3–4 weeks
10 L mineral ≈ 1 week
That framing makes the value proposition much clearer.
If you’re curious about why we created PurrStainable and how we make our sustainable tofu litter, you can read more here:
Many Catsan users overfill their tray because they think deeper = better. When they switch to tofu litter, they realise they were using far more litter than necessary.
Cost comparison
Mineral litter (like Catsan)
Typical UK price for 10L: £7–£10 per bag
Typical usage for 1 cat: 1 bag ≈ 7–10 days
Monthly cost: 3–4 bags per month £28–£40
Tofu litter (3 kg bag)
PurrStainable Subscribe & Save price: £12.37 per 3 kg bag
Typical usage: 1 bag ≈ 3–4 weeks
Monthly cost: £12.37 per bag
Simple comparison (1 cat)
Mineral litter (like Catsan)
Typical UK price for 10L: £7–£10 per bag
Typical usage for 1 cat: 1 bag ≈ 7–10 days
Monthly cost: 3–4 bags per month £28–£40
Tofu litter (3 kg bag)
PurrStainable Subscribe & Save price: £12.37 per 3 kg bag
Typical usage: 1 bag ≈ 3–4 weeks
Monthly cost: £12.37 per bag
Potential saving: £15.63–£27.63 per month per cat.
You can see our current pricing and Subscribe & Save options here:
Why this is interesting for PurrStainable
This is one of the strongest arguments for tofu cat litter:
People often think: “Tofu litter is expensive.”
But when you compare monthly usage, it often works out cheaper than mineral litter.
One bag lasts around a month for one cat, meaning it can cost up to 71% less per month than traditional mineral litter.
For cat owners looking for a natural, sustainable alternative to clay litter, tofu litter offers better performance, less waste, and long‑term savings.
