Built for Instant Clarity

Free online calculators and smart utility tools for everyday decisions — finance, health, math, productivity, and daily problem-solving. No sign-up, no friction.

Open Tool Index
00

Index

A

Finance & Investment

28 tools
Investment Return → Debt Payoff →
B

Business & Operations

22 tools
Burn Rate → Break-Even →
C

Health & Wellness

18 tools
Calorie Surplus → Life Expectancy →
D

Math & Conversion

15 tools
Currency Converter → Cooking Conversion →
E

Marketing & Growth

16 tools
Marketing ROI → CPA Calculator →
F

Shipping & Logistics

14 tools
Landed Cost → Freight Class →
G

Home & Living

12 tools
Home Office Deduction → Grocery Budget →
H

Gaming & Fun

10 tools
Card Draw Probability → Gem Spending Value →
01

Featured Specs

01
FinanceFeatured

Investment Return Calculator

Input: principal, rate, term → Output: total return, annualized gain

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02
FinanceFeatured

Debt Payoff Calculator

Input: balance, APR, monthly payment → Output: payoff date, total interest

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03
MarketingFeatured

Marketing ROI Calculator

Input: spend, revenue generated → Output: ROI %, cost per acquisition

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04
HealthFeatured

Calorie Surplus Calculator

Input: TDEE, intake, activity → Output: surplus/deficit, projected weight change

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05
BusinessFeatured

Burn Rate Calculator

Input: monthly expenses, cash on hand → Output: runway in months

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06
ConversionFeatured

Currency Converter

Input: amount, from/to currency → Output: converted amount with live rate

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07
LogisticsFeatured

Landed Cost Calculator

Input: product cost, shipping, duties → Output: true per-unit cost

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08
BusinessFeatured

Break-Even Analysis

Input: fixed costs, price, variable cost → Output: break-even units & revenue

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02

Tool Grid

Amortization Schedule

FIN

APY Calculator

FIN

CPM Calculator

MKT

CPC Calculator

MKT

Current Ratio

BIZ

Debt-to-Equity Ratio

FIN

Debt Avalanche

FIN

Dropshipping Profit

BIZ

Effective Tax Rate

FIN

EPS Calculator

FIN

Customer LTV

MKT

Contribution Margin

BIZ

Cooking Conversion

CNV

CBM Volume

LOG

Freight Class

LOG

Home Office Deduction

FIN

Holiday Pay

FIN

Income Tax

FIN

Gift Tax

FIN

Lead Scoring Model

MKT
03

Blueprint

①
Debt Payoff

How long to get out of debt?

Total balance$28,500
APR19.9%
Monthly payment$650
Payoff time62 months
Total interest$11,760
Run calculation →
②
Business Runway

How many months of runway left?

Cash on hand$180,000
Monthly burn$22,500
Revenue/month$8,000
Net burn$14,500/mo
Runway12.4 months
Run calculation →
③
Import Cost

What's the true cost of that shipment?

Product cost$12,000
Shipping$2,400
Duties & taxes$1,920
Landed cost$16,320
Cost markup36%
Run calculation →
04

Notes

Our calculators use standard financial and mathematical formulas and are reviewed for accuracy. However, they are designed for estimation and personal decision-making — not as a substitute for professional accounting, tax, or legal advice. For high-stakes decisions (tax filings, loan applications, legal documents), always verify with a licensed professional.
No. All calculations happen entirely in your browser. Nothing you type is sent to our servers, stored in a database, or shared with third parties. When you close the tab, your inputs are gone. We don't require accounts, and we don't track what you calculate.
Every single tool on ToolBoost is 100% free — no account, no email, no trial period, no premium tier. Open any calculator, enter your numbers, and get your result immediately. No strings attached.
We review and update reference data (tax brackets, standard deductions, average rates) on a regular cycle. That said, always replace pre-filled defaults with your actual numbers — your bank's rate or your state's tax table will always be more precise than any generic default. Each tool page shows when its reference data was last updated.
Yes. Every tool on ToolBoost works on any modern browser — desktop, phone, or tablet. No app download needed. The interface adapts to your screen size so you can run calculations on the go, whether you're at your desk or standing in a store aisle comparing prices.