Fast and accurate stock, crypto & investment calculations.
Essential tools for investors
Calqio is a free financial calculator platform that handles all essential calculations for stock, cryptocurrency, real estate, and loan decisions. No registration required, and your input data is never sent to servers β everything is processed locally in your browser for complete privacy. Available in 5 languages (Korean, English, Japanese, Chinese, Arabic), Calqio serves investors worldwide with accurate, instant financial computations.
Our compound interest calculator simulates how your wealth grows over time when you input initial principal, additional contributions, annual rate, and investment period. We support daily, monthly, and annual compounding, making it perfect for cryptocurrency trading simulations, savings accounts, dividend reinvestment, and retirement planning. Tax adjustment options allow you to view after-tax net returns with 15.4% standard taxation included. The classic Rule of 72 (72 Γ· annual rate = years to double) is also calculated automatically.
When trading stocks or crypto, input buy price, sell price, quantity, and transaction fees (typically 0.015%~0.25%) to instantly calculate realized profit and actual return rate. This tool reveals exactly how much trading fees impact your short-term profitability, helping you build smarter trading strategies.
The average down calculator automatically computes your new average cost and break-even price after additional purchases during price drops. Simply enter your original buy price and quantity, then the additional purchase price and quantity. Note that reckless averaging down can amplify losses, so always verify your break-even point before making decisions.
Before signing any mortgage, personal loan, or auto loan, use our loan calculator. Enter loan amount, interest rate, and term to compare monthly payments and total interest across three repayment methods: equal payment, equal principal, and balloon payment. Annual amortization schedules included. Even at the same rate, total interest can vary by thousands of dollars depending on repayment method.
For dividend stocks (SCHD, JEPI, etc.) and ETFs, input share price and dividend per share to calculate yield and actual after-tax income. International withholding tax (typically 15%) is automatically applied for accurate net returns.
Based on your buy price, input target profit percentage and stop-loss percentage to automatically calculate exit prices. Essential for disciplined trading and removing emotion from your decisions.
Calculate capital gains tax on international stock and ETF sales. Input buy price, sell price, exchange rate, and quantity to get accurate tax calculations with standard deductions automatically applied.
Handle rate of change, discount calculations, increase/decrease, and reverse percentage calculations all in one place. "What percent is A of B?", "Value after X% increase from Y?" β every ratio calculation you need.
Beyond simple calculators, Calqio offers an ETF backtesting simulator for QQQ (NASDAQ-100), TQQQ (3x leveraged), SCHD (dividend growth), and VOO (S&P 500). Compare 10-year asset growth in real time with optional dividend reinvestment for accurate long-term compound simulation.
Our AI investment analysis prompt library provides institutional-grade analysis templates for ChatGPT, Claude, and Perplexity. Copy and paste ready-to-use prompts for stock analysis, earnings review, risk assessment, ETF comparison, and portfolio diagnostics.
Your calculation inputs are automatically synced to the URL in real time. Copy that link to share with friends, communities, or your trading group β they'll see the exact same calculation results instantly. Perfect for sharing portfolios in investment communities.
All calculators use standard financial formulas for mathematical accuracy. However, actual investment returns, taxes, and loan terms may vary based on market conditions, institutional policies, and laws. Always consult qualified professionals for major decisions.
No. All calculations happen entirely in your browser β nothing is sent to servers. Closing the page erases your inputs.
Yes, all calculators are optimized for iPhone, Galaxy, and other smartphones. Touch-friendly UI with no horizontal scrolling.
We use official ETF reports and publicly available market data sources like Yahoo Finance. Past performance does not guarantee future returns β use for reference only.