Six calculators that answer the questions owners actually ask before they spend money — how big, how many, how steep, how much. No email, no account, no sales pitch, and every threshold we use is published on the page.
Dog & Cat Feeding & Water Calculator
Tell us what you feed, how heavy your pet is and how long you will be away. You get the hopper size, the meals per day, the fountain capacity and the backup power your gear actually needs — plus a straight answer on how long is safe.
- Hopper capacity in grams and litres
- Fountain size and daily water need
- Battery days you must plan for
Dog & Cat Ramp Angle & Stairs Calculator
Measure the height your pet climbs and the floor space you have. You get the safest angle for their joints, how much run a ramp needs, or the step height if a ramp will not fit.
- Maximum safe angle for their joints
- Floor run a ramp really needs
- Step count and rise if space is short
Cat Litter Box Size & Number Calculator
Say how many cats you have and how long the biggest one is. You get the number of boxes, the smallest box that still works, and where each one has to go.
- Boxes your household actually needs
- Minimum length and width per box
- Placement rules that stop accidents
Dog & Cat Air Purifier Size Calculator
Enter the room and how heavy the pet load is. You get the CADR to look for in both m³/h and CFM, plus the carbon weight and filter life most listings never mention.
- CADR in m³/h and in CFM
- Carbon weight for litter odour
- What pets do to filter life
Dog & Cat Airline Carrier Size Calculator
Four measurements and you have the container size an airline will accept — the internal size your pet needs, and the outside size to actually shop for.
- IATA internal dimensions
- Outside size to actually buy
- What changes for flat-faced breeds
Dog & Cat Treat Calorie Calculator
Treats have a published daily ceiling that most owners go straight past. Work out your pet’s allowance, and what it looks like in biscuits, cheese and carrots.
- Daily treat calorie limit
- What that is in real treats
- The deduction rule owners miss
Is Your Pet Overweight? A Body Condition Guide
A nine-point body condition chart you can use by hand, the formula for estimating ideal weight, and the safe rate to lose it. No calculator on purpose — body condition is a judgement, and a target weight should come from your vet.
- Score your dog or cat by hand
- Estimate the ideal weight
- When it is a vet visit, not a diet