About How Long
We are dedicated to answering a seemingly simple yet ubiquitous question: How long does this take?
From "How many minutes to boil an egg" "How long to cook corn", to "How long does passport processing take" "How long do alcohol/nicotine stay in the body" "How long do cats live" "How long can eggs be stored in the fridge", we use systematic methods to provide clear, reliable, and actionable duration references.
Cooking Time
How many minutes to cook eggs to different doneness levels? How long for corn, potatoes, steak, pasta? The balance of heat, taste, and safety at a glance.
Daily & Administrative
Passport processing, business licenses, visa appointments, express delivery... Standard timeframes and considerations for different cities/countries are well-documented.
Health & Metabolism
How long does it take for alcohol and nicotine to metabolize in the body? How long for muscle recovery after exercise? Reference ranges based on scientific research and authoritative literature.
Life & Lifespan
How long do cats live? How do different breeds, sizes, and living environments affect lifespan? Ranges and recommendations based on statistics and research.
Storage & Shelf Life
How long can eggs be stored in the fridge? Usage periods and storage recommendations for food, medicine, cosmetics, and electronic products.
More Domains
Learning, professional skills, sports training, travel routes... We continuously expand more scenarios and question types, covering every "how long" you have.
Our Methodology
To provide reliable duration references, we integrate authoritative sources with real experiences, clearly stating applicable conditions and variation ranges in our presentations.
Multi-source Data Calibration
Reference standard specifications, academic papers, institutional guidelines, and brand instructions, combined with user feedback for cross-validation.
Clear Conditions & Ranges
Clearly identify key variables affecting duration (such as temperature, weight, regional policies, individual differences, etc.) and provide understandable ranges and boundaries.
Continuous Updates
Continuously maintain and iterate answer content with policy changes, technological advances, and new research developments.
Concise & Actionable
Present results in concise, actionable formats to help you make decisions quickly and start taking action.
Start Exploring Your "How Long"
Search for your questions in How Long, or browse our continuously updated featured topics and in-depth analyses.