Time & Calculations
How long does it take? How much do you need? Get precise answers to quantity and time questions.
17 questions answered
Precise numbers matter when you are measuring ingredients, calculating costs, planning time, or converting between units. A tablespoon-to-milliliter conversion error can ruin a recipe; misunderstanding kilowatt-hours versus watts can lead to a surprisingly high electric bill.
Our calculation guides provide exact figures with the formulas behind them, so you can adapt the answer to your specific situation. We include worked examples and common variations that affect the result.
Top Questions
How Long Do Eggs Last in the Fridge?
Fresh eggs last 3-5 weeks in the refrigerator past the pack date, or about 3 weeks past the sell-by date. Hard-boiled eg...
Read answerHow Long Does Butter Last?
Refrigerated butter lasts 1-3 months past the printed date. Frozen butter keeps for 6-12 months. Room temperature butter...
Read answerHow Long Does Cooked Chicken Last in the Fridge?
Cooked chicken lasts 3-4 days in the refrigerator when stored properly at 40°F (4°C) or below. Store in shallow, airtigh...
Read answerHow Long Does It Take to Form a Habit?
Habits take an average of 66 days to form, not 21 days as commonly claimed. A 2009 UCL study found the range was 18 to 2...
Read answerHow Long Does It Take to Learn a Language?
The US Foreign Service estimates 600-750 hours for 'easy' languages (Spanish, French, Italian) and 2,200+ hours for 'har...
Read answerHow Long Does It Take to Learn Guitar?
Basic guitar skills (simple chords, easy songs) typically take 1-3 months of regular practice. Intermediate level (barre...
Read answerAll Time & Calculations Questions (17)
- How Long Do Eggs Last in the Fridge?
- How Long Does Butter Last?
- How Long Does Cooked Chicken Last in the Fridge?
- How Long Does It Take to Form a Habit?
- How Long Does It Take to Learn a Language?
- How Long Does It Take to Learn Guitar?
- How Long Does Pasta Last in the Fridge?
- How Long Does Pizza Last in the Fridge?
- How Long Does Rice Last in the Fridge?
- How Many Days Between Two Dates?
- How Many Gallons of Paint for a Bedroom?
- How Many Weeks Between Two Dates?
- How Much Does It Cost to Charge a Phone?
- How Much Paint Do I Need for a Room?
- How Much Protein Do You Need?
- How Much Sleep Do You Need?
- How Much Water Should You Drink?