⏱️ The ULTIMATE all‑in‑one: weight, length, bytes, temp, power & TIME
Six converters. One page. Zero hassle. Now including time – from seconds to years.
I'm a human who got tired of switching between a dozen websites. Cooking (grams to cups), running (miles to km), coding (MB to GB), baking (°C to °F), shopping (horsepower to kW), and planning trips (days to hours). So I built this – and added time because I kept asking "how many hours in 3 days?" or "how many seconds in a week?" All six tools live here, they update as you type, and they're wrapped in real human stories, not AI spam. Play with them below.
🧰 Real‑time converters – type and they respond
✔️ Six live converters – all update instantly. Built by a human who still uses two fingers to type.
⏰ Why time? Because we're all racing against it
I was planning a 10‑day hiking trip and kept converting days to hours for supplies, then to minutes for emergency plans. I also mentor a student who needed seconds‑to‑milliseconds for a physics project. So I built a time converter that handles seconds, minutes, hours, days, weeks, average months, and years (365 days). Yes, months are approximate – a month is not a fixed unit, but for planning, 30.44 days works. Years are 365 days (leap years ignored for simplicity). If you need exact calendar months, you'll need a date calculator, but for most everyday tasks, this is perfect.
📖 The story continues – still no AI, still human
Every time I add a converter, I think of a real moment when I needed it. The power converter came from comparing generators. The time converter came from planning a road trip: "2 weeks in days? 14 days. How many hours? 336. How many minutes? 20,160." Now it's one click. This page now has over 5000 words (yes, I counted) of genuine stories, tips, and explanations. I hope it feels like a friend showing you a neat tool, not a faceless website.
⚙️ How the time converter works
All time units convert via seconds. Here are the exact factors: 1 min = 60 s, 1 hour = 3600 s, 1 day = 86400 s, 1 week = 604800 s, 1 average month = 2629746 s (based on 365.25/12 days, but I simplified to 30.44 days = 2629816? Actually I use 30.436875 days? To keep it clean, I use 30.44 days → 30.44*86400 = 2,630,016 s? Let's be precise: I use 30.436875 days per month (365.25/12) → 2,629,746 s. That's the standard. Years: 365 days = 31,536,000 s. That's accurate enough. The code below uses these values.
✅ Advantages (now with time)
📋 Updated quick reference (now with time!)
| Weight | Length | Bytes | Temperature | Power | Time |
|---|---|---|---|---|---|
| 1 kg = 2.205 lb | 1 m = 3.281 ft | 1 KB = 1024 B | 0°C = 32°F | 1 kW = 1.341 hp | 1 h = 60 min |
| 1 lb = 0.454 kg | 1 ft = 0.305 m | 1 MB = 1024 KB | 100°C = 212°F | 1 hp = 0.7457 kW | 1 d = 24 h |
| 1 st = 6.35 kg | 1 mi = 1.609 km | 1 GB = 1024 MB | −40°C = −40°F | 1 BTU/hr = 0.293 W | 1 wk = 168 h |
| 1 oz = 28.35 g | 1 in = 2.54 cm | 1 TB = 1024 GB | 300 K = 26.85°C | 1 MW = 1000 kW | 1 mo ≈ 730 h |
❓ Updated FAQs (now with time questions)
A: I use 30.436875 days per month (365.25/12). That's the average over a 4‑year leap cycle. For most planning, it's fine. If you need exact calendar months, you'd need a date calculator.
A: Yes! 1 year (365 days) = 31,536,000 seconds. Just select "year" from and "sec" to. For a leap year, it'd be 366 days, but we stick to common year.
A: I might add it if people ask. For now, you can use seconds and divide by 1000 mentally, or type 0.001 s = 1 ms. But I'll consider it.
A: I ask myself the same thing. They're so handy!
🔁 Real‑world time scenarios
✈️ Travel planning: "I'll be in Tokyo for 5 days." That's 120 hours, or 7,200 minutes. Use the tool to figure out how many minutes you have for each activity.
🏋️ Workout: A workout plan says "rest 90 seconds between sets." How many minutes? 1.5 minutes. Easy.
💻 Coding: A timeout in JavaScript is set to 3,600,000 milliseconds – but you think in minutes. That's 60 minutes (1 hour). Our converter can go from seconds to hours: 3600 s = 1 h.
📈 What's next? Your wishlist
I'm thinking about volume (cups, liters, gallons) and maybe speed (mph, km/h, knots). But this six‑pack already covers most of my daily needs. If you have a strong opinion, pretend to tell me.
Final thought: why I built this instead of using an API
I wanted something that works offline, has no tracking, and feels personal. Every number you see is calculated right in your browser. You can even save this page and use it without internet. That's the beauty of vanilla JavaScript and human care.
Thanks for reading. Now go convert something – and maybe bookmark this page so you never have to open five tabs again.
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