Science · 6 min
How to calculate a percentage and a per mille of a number: the formulas, the difference between percent and per mille, converting fractions, and worked examples.
· Redakcja Liczbnik
Animals · 6 min
The myth "1 dog year = 7 human years" no longer holds. We explain how breed size affects dog age conversion, with worked numeric examples.
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Animals · 5 min
How many human years does your cat have? We show the current cat age converter, life stages from kitten to senior, and a step-by-step example.
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Animals · 6 min
How much food does a dog need per day? We explain how to portion dry and wet food based on weight, age and activity, with a worked numeric example.
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Animals · 7 min
How to calculate a dog's calorie requirement? We explain the RER = 70 × (kg)^0.75 formula, the MER factors, and show a full worked example.
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Animals · 6 min
How long does a bitch's pregnancy last and how to calculate the due date? We cover the length, week-by-week stages, signs, and a simple way to work out the date.
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Animals · 7 min
How much does keeping a dog cost per year in 2026? We break down spending on food, the vet, accessories and insurance, with a sample annual budget.
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Animals · 6 min
How much does a cat cost per year in 2026? We present spending on food, litter, the vet and accessories, plus a sample annual budget for keeping a cat.
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Animals · 6 min
Does insuring a dog or cat pay off? We explain what a policy covers, how much it costs and when it makes sense, with a sample cost-effectiveness calculation.
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Animals · 6 min
How much food does a cat need per day? We explain portioning of dry and wet food based on a cat's weight and activity, with a sample portion calculation.
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Animals · 6 min
What is the ideal weight for your dog's breed? We show weight ranges for popular breeds, the Body Condition Score (BCS) scale and a step-by-step assessment.
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Health · 6 min
Naegele’s rule step by step: from the first day of your last period add 7 days and subtract 3 months. We explain the formula and show an example.
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