2026년 최고의 무료 금융 계산 도구
무료 온라인 금융 계산기.
Percentage and discount calculators
- Percentage Calculator — X% of a number, what percent A is of B, increase/decrease.
- Discount Calculator — Final price, stacked discounts, original price from discount.
Read our discount calculation guide.
Currency converter and exchange rates
The NexTools currency converter supports 150+ currencies with daily rates. Interbank (mid-market) rate, instant conversion, specific pair pages.
Read the currency converter guide for hidden fees and best exchange tips.
Compound interest calculator
The compound interest calculator shows money growth over time.
Example: $10,000 at 8% for 20 years = $46,610 (compound) vs $26,000 (simple). Difference: $20,610.
Rule of 72: 72/interest rate = years to double. 72/8% = 9 years.
Use the percentage calculator for quick rate calculations.
Tip calculator by country
The tip calculator calculates correct tips by country with split option.
US: 18-22%. Mexico: 10-15%. Spain: 5-10%. Japan: 0%. Colombia: 10% included.
Read the tipping by country guide.
Country-specific tax calculators
NexTools offers specialized calculators: US Tax, Mexico Aguinaldo, Colombia Severance, Argentina Monotributo, Germany Brutto-Netto, Peru CTS. Each uses current country-specific rates.
Loan and payment calculators
The loan payment calculator shows monthly payments.
Example: $200,000 at 7% for 30 years = $1,331/month. Total: $479,160. Interest: $279,160 (139% of loan).
BMI and health calculator
The BMI calculator complements financial health planning. BMI outside normal range can impact life/health insurance premiums.
Read the BMI calculation guide.
Why use online calculators vs Excel
Online: Instant results, pre-built formulas, any device, no formula errors.
Excel: Better for repetitive analysis, charts, what-if scenarios.
Ideal combo: Online for quick daily decisions. Excel for detailed long-term planning.
자주 묻는 질문
Are NexTools calculators accurate for financial decisions
Yes for math. However, not financial advice. For important decisions, consult a financial advisor.
Are NexTools exchange rates real-time
Updated daily, not real-time. For forex trading, use broker data. For everyday conversions, daily rates suffice.
Can I trust the tax calculator for my tax return
They're estimates based on official rates. For official filing, use your tax authority's software.
How do I quickly calculate compound interest
Rule of 72: divide 72 by annual rate. 72/8% = 9 years to double. Approximation — calculator gives exact values.
What's the difference between simple and compound interest
Simple: interest on principal only. Compound: interest on principal + accumulated interest. Grows exponentially over time.
Does NexTools have calculators for my country
Specific calculators for USA, Mexico, Colombia, Argentina, Peru, UK, Germany, Australia. General calculators (percentages, interest) work universally.