Health & Fitness•8 min read
BMR vs TDEE: What’s the Difference?
Learn how basal metabolic rate and total daily energy expenditure differ, how each is estimated, and which number to use when planning calories.
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Practical Guides & Insights
Clear, expert-reviewed guides and data-driven insights that help you make smarter decisions with the right calculations.
Basal metabolism~65%
Daily activity~25%
Food digestion~10%
Illustrative proportions only. Individual energy expenditure varies with body size, activity, and other factors.
Explore the relationship, then calculate your own BMR and TDEE.
Health & Fitness
24,000 steps2.5 ft / step
11.36
miles
18.29
kilometers
2.0 ft step · 9.09 mi2.8 ft step · 12.73 mi
Aug 2, 2026 • 7 min read
24,000 Steps to Miles: How Far Is It?
24,000 steps is about 11.36 miles (18.29 km) at a 2.5-foot step length. See the formula, realistic range, walking time, and a more accurate method.
Read guideBMR vs TDEE: What’s the Difference?
Learn how basal metabolic rate and total daily energy expenditure differ, how each is estimated, and which number to use when planning calories.
Money & Finance
Amortization
Jul 28, 2026 • 9 min read
How Extra Mortgage Payments Reduce Interest
See how additional principal payments change a fixed-rate mortgage amortization schedule, shorten payoff time, and reduce total interest.
Read guideDeveloper Guides
response.jsondiagnostic
const raw = "<!doctype html>";
JSON.parse(raw);
Unexpected token '<' in JSON at position 0
Aug 2, 2026 • 11 min read
Unexpected Token in JSON at Position 0: Causes and Fixes
Fix Unexpected token errors in JSON by checking the raw response, HTTP status, content type, quotes, commas, empty bodies, and hidden characters.
Read guideHow Many Usable Hosts Are in a /27 Subnet?
A /27 IPv4 subnet contains 32 total addresses and 30 traditional usable host addresses. See the mask, block size, ranges, and worked examples.
Subnet Mask Cheat Sheet: CIDR, Addresses, and Hosts
Convert common CIDR prefixes to subnet masks, total addresses, and traditional usable-host counts with worked IPv4 examples.
Photography
Motion recipes start here
01 · Silky water
1/2–2 s
tripod · ISO 100
02 · Panning
1/30–1/60
follow the subject
03 · Light trails
5–20 s
tripod · f/8
Aug 2, 2026 • 8 min read
Camera Settings for Motion Blur: Water, Traffic, and Panning
Use practical starting settings to photograph silky water, light trails, blurred crowds, and sharp-subject panning—then learn exactly what to adjust.
Read guideHow to Blur the Background: Camera Settings That Matter
Create a softer background with practical aperture, focal-length, and distance choices—even with a kit lens. Includes portrait recipes and troubleshooting.
Low-Light Portrait Camera Settings: A Practical Guide
Start with shutter speed, a wide aperture, and Auto ISO to keep low-light portraits sharp. Includes indoor, night-street, and moving-subject recipes.
What Shutter Speed Freezes Sports? Settings by Activity
Start at 1/1000 second for most field and court sports, then adjust for walking, running, fast balls, wheels, indoor light, and the amount of blur you accept.
How to Photograph Stars Without Star Trails
Use a wide lens, short exposure, wide aperture, and high ISO to keep stars round. See starting shutter speeds by focal length and how to fix tiny trails.
What Shutter Speed Makes Water Look Silky?
Start around 1 second for silky waterfalls, then use faster speeds for texture or longer exposures for mist. Includes settings, ND filters, and troubleshooting.
The Sunny 16 Rule: A Practical Exposure Guide
Use the Sunny 16 rule to estimate daylight exposure, then trade aperture, shutter speed, and ISO without changing total exposure.
Date & Time
143 hours÷ 24
5
full days
23
hours
5.9583 days1 hour short of 6 days
Aug 2, 2026 • 6 min read
How Many Days Is 143 Hours? Exact Answer and Breakdown
143 hours equals exactly 5 days and 23 hours, or approximately 5.9583 days. See the calculation, workday equivalents, and common conversion mistakes.
Read guide