Free Guides for Finance, Health & More

Normal INR is 0.8–1.2. On warfarin, your target is 2.0–3.0. See every zone, food interactions, and drug interactions.

Miss the enrollment window and pay 10% extra per year permanently. Learn when it applies, who is exempt, and how to avoid it.

Central HVAC costs $5,000–$12,500 installed. Full breakdown by system type, home size, SEER rating, and ductwork condition.

2.9% + $0.30 is just the start. International cards, instant payouts, ACH, disputes — every Stripe fee explained.

One formula covers every scenario: (Actual / Full Period) × Total Amount. Worked examples for insurance, salary, and rent.

Side-by-side of every fee: personal transfers, business payments, instant cash-out, and international. Which app costs less?

Workers comp = 2/3 of your average weekly wage up to state maximum. Exact formula, all benefit types, and state differences.

LSAT scores range 120–180. How raw scores convert to scaled scores, percentile rankings, and what top law schools require.

TDEE = BMR × Activity Multiplier. Calculate how many calories you actually burn each day — foundation of any diet or fitness plan.

A 3.5 GPA is an A-/B+ average, top 30% of students. Full 4.0 scale, letter grade equivalents, and grad school requirements.

Roof replacement costs $5,700–$16,000 for most homes. Full breakdown by material, size, pitch, and region.

What is a board foot of lumber? Learn the board foot formula, lumber pricing by species, and exactly how much wood to buy for decks, framing, and furniture projects.

How much does house repiping cost in 2026? Full cost breakdown by pipe material, home size, and labor — plus when to repipe and how to pay for it.

What is DSCR and how do you calculate it? Learn the DSCR formula, what lenders require, and how to improve your ratio for commercial or investment property loans.

How much is a motorcycle accident settlement worth in 2026? See average payouts by injury type, how fault affects value, and how insurance companies calculate offers.

How much does roof decking replacement cost in 2026? See cost per sheet, full replacement ranges by home size, OSB vs plywood, and when you actually need new sheathing.

See real CPM benchmarks for Facebook, Google, YouTube, TikTok & more — plus how to lower your cost per thousand impressions fast.

Learn the IBC occupancy load formula, occupancy classifications, square footage per person, and fire code requirements.

What is yield maintenance on a commercial loan? Learn how the yield maintenance prepayment penalty is calculated and how to minimize it when refinancing.