+1 Drain Water Per Click Calculator — Water Per Click
Plan your clicks before you buy a pump. This 1 drain water per click calculator multiplies your water pump, mutation and pet boost into a Water-per-click estimate, and compares every pump's multiplier against its price (updated August 24, 2026). Every number is cross-checked; nothing is estimated.
Water Per Click Calculator
Pick your pump, toggle your pet boost and set your click rate to see Water per click and per second — the core of every 1 drain water per click build.
| Base pump multiplier | x1 |
| Mutation bonus (fish only) | Gold x2 · Diamond x5 · Venom x10 · Hole x20 |
Mutations apply to fish catches, never to clicks — a Venom or Hole catch multiplies its sell price, which the mutations page explores in detail.
Every water pump the 1 drain water per click calculator tracks
| Pump | Rarity | Water / click | Price | Tier |
|---|---|---|---|---|
| Water Pump | Common | ×1 | — | Free |
| Water Pump Plus | Common | ×5 | — | Free |
| Lgnisthul | OG | ×7.5 | — | Free |
| Lucky Clover | Rare | ×12 | 300 Water | D |
| Sunflower | Rare | ×30 | 3,000 Water | D |
| Ocean | Epic | ×50 | 15,000 Water | D |
| Electric | Epic | ×125 | 30,000 Water | D |
| Volcanic Lava | Legendary | ×300 | 70,000 Water | D |
| Jelly | Legendary | ×500 | 150,000 Water | D |
| Golden | Legendary | ×1,250 | 400,000 Water | C |
| Rainbow Candy | Legendary | ×3,100 | 1,250,000 Water | C |
| Venom | Mythic | ×5,000 | 2,750,000 Water | C |
| Demon | Mythic | ×12,500 | 10,000,000 Water | B |
| Unicorn Fantasy | Mythic | ×31,000 | 80 Robux | B |
| Blue Mushroom | Mythic | ×70,000 | 22,500,000 Water | B |
| Halloween Pumpkin | Mythic | ×150,000 | 45,000,000 Water | B |
| Ice Penguin | Exclusive | ×300,000 | 80,000,000 Water | A |
| Amethyst | Exclusive | ×750,000 | 300,000,000 Water | A |
| Cake | Exclusive | ×1,000,000 | 399 Robux | A |
| Rocket | Exclusive | ×1,880,000 | 1,000,000,000 Water | A |
| Dianeti | Exclusive | ×4,000,000 | 15,000,000,000 Water | S |
Sources: roonby.com (Aug 21 2026), techwiser.com (Aug 22 2026) — cross-checked pump list and multipliers. Best pump in the game: Community consensus ranks Dianeti as the only S-tier pump, followed by Rocket, Cake, Amethyst and Ice Penguin as A-tier endgame picks. Rarity and per-click multiplier were both cross-verified across roonby.com and techwiser.com.
This 1 drain water per click calculator weighs every pump on a single number — Water per click against price — so you never guess between two similar upgrades. Keep it open while you play: the 1 drain water per click calculator output updates the moment you change your pump, mutation or pet boost, and it is the fastest answer to which 1 drain water per click calculator buy is next. Recheck the table after each update, because a new 1 drain water per click calculator-friendly pump can shift the whole buying order.
When to open the 1 drain water per click calculator
Before a pump purchase
Compare the next pump's multiplier against the Water you would need to save. The 1 drain water per click calculator shows how many clicks the upgrade pays back.
Before a rebirth
A rebirth trades your current Water for a permanent multiplier that resets your pumps. Run the 1 drain water per click calculator to see whether a fresh-start still out-clicks your current save.
Before a mutation hunt
Venom and Hole fish are worth a lot per catch. The 1 drain water per click calculator breaks out each mutation multiplier so the value is obvious when one appears.
How to read the 1 drain water per click calculator
The multiplier that matters is Water per click — your pump value, times any pet boost, times the best mutation you can land. A pump that triples the prior step usually beats one that doubles, even if it costs more Water, because every pool drains faster and unlocks a bigger payout. The 1 drain water per click calculator turns that rule of thumb into a concrete number before you commit, and the tier list ranks which pumps are worth the save.
The smart play: redeem active codes for free pets first (Shark, Exotic Mosasaurus Fish and Lava Aquarium all come from codes), then buy the cheapest high-multiplier pump. Free pets boost your per-click output before you spend a single Water — the 1 drain water per click calculator makes that trade-off visible.
The four fish mutations, priced
Mutations apply to a single fish and never to your clicks. Each one multiplies that fish's sell price and tank revenue. Gold is common, Diamond and Venom rarer, and Hole is the S-tier prize that appears most during the Black Hole weather event. The 1 drain water per click calculator lists these mutation multipliers next to the pumps, so the value of a Venom or Hole catch is obvious the moment one appears.
Gold
×2Spawns naturally in all open pools — the most common mutation.
Diamond
×5Spawns naturally in all open pools, rarer than Gold.
Venom
×10Spawns naturally at a low rate in all pools; much more common during the Poison weather event.
Poison (+10% spawn, 4 minutes)
Hole
×20The rarest mutation. Has a low natural spawn rate; heavily boosted during the Black Hole weather event.
Black Hole (+10% spawn, 4 minutes)
The math behind the 1 drain water per click calculator
Water per click: pump multiplier × pet boost — the exact formula the 1 drain water per click calculator uses. The starting Water Pump drains exactly +1 Water per click; Water Pump Plus jumps to 5x, and Dianeti sits at 4,000,000x.
Mutation value per catch: base fish value × mutation multiplier. A Hole fish (×20) sells for twenty times a normal catch — grab them fast, because mutated fish disappear after a short time. Feed these numbers into the 1 drain water per click calculator to estimate total session value.
Cost efficiency: new multiplier ÷ added price. The 1 drain water per click calculator highlights the step with the best multiplier-per-Water ratio so you never grind 100,000 Water for a marginal 1.5x bump.
FAQ
How does the 1 drain water per click calculator work?
The 1 drain water per click calculator multiplies your current pump multiplier by your mutation multiplier and pet boost to estimate Water per click. It compares every pump in the shop by Water-per-click value and cost, so you can plan the cheapest upgrade step before you spend. All numbers come from the cross-checked pump tables.
Which water pump should the 1 drain water per click calculator recommend first?
The 1 drain water per click calculator flags Lucky Clover at 12x for just 300 Water as the best value first paid upgrade on a fresh account, ahead of Water Pump Plus. From there you step up to Sunflower and then Ocean at 50x before the mid-game Epic pumps.
What is the best pump in the game?
Community consensus ranks Dianeti as the only S-tier pump at 4,000,000 Water per click. The 1 drain water per click calculator uses that tier summary to label endgame targets, with Rocket, Cake, Amethyst and Ice Penguin as the A-tier picks just below it.
Are the numbers in the 1 drain water per click calculator exact?
They are the best cross-checked community multipliers, verified against roonby.com and techwiser.com. Pump values and prices can shift between patches, so treat the 1 drain water per click calculator output as planning guidance and confirm the shop before a big purchase.
How do mutations factor into the 1 drain water per click calculator?
Mutations apply to fish, not clicks: Gold x2, Diamond x5, Venom x10 and Hole x20 raise each fish's sell price and tank value. The 1 drain water per click calculator shows those multipliers so you know what a Venom or Hole catch is really worth before you grab it.
Do pets change the 1 drain water per click calculator output?
Pets raise your click-drain efficiency and help you reach the bottom of a pool faster for rarer fish. The 1 drain water per click calculator applies a pet boost to per-click output; keep the highest-rarity pet you earn early for the biggest boost.
