25 free tools · No signup · No paywalls
Free Online Calculators & Data Tools
Free calculators and data tools built for people who want answers, not explanations. Finance, data, business — one click, done.
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📌 Popular Tools
💰 Free Finance Calculators
Free online financial calculators for profit margins, compound interest, break-even analysis, salary conversions, and more. Perfect for investors, entrepreneurs, and finance professionals.
🏢 Business Tools for Entrepreneurs
Essential business calculators including ROI calculators, break-even analysis, and profit margin calculators to help you make data-driven decisions for your business.
📊 Online Data Processing Tools
Transform and analyze your data with our free online tools. Clean CSV files, convert between data formats, detect data types, and process large datasets directly in your browser.
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5💷
Salary Calculator
Convert between annual, monthly, weekly, and hourly salary. Instant breakdown.
Finance
📈
Compound Interest Calculator
See how your investment grows over time with compound interest. Year-by-year breakdown.
Finance
📊
Profit Margin Calculator
Calculate gross, net, and operating profit margin. Includes markup vs margin explanation.
Finance
⚖️
Break-Even Calculator
Find the exact units or revenue needed to cover your costs. With break-even chart.
Finance
🧾
VAT Calculator
Add or remove VAT from any price. Supports custom rates and all major country rates.
Finance
📊
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12🧹
CSV Cleaner
Upload a CSV and remove duplicates, blank rows, and whitespace. Download cleaned file.
Data
⟷
JSON to CSV Converter
Paste JSON and instantly convert to CSV. Handles nested objects and arrays.
Data
{}
CSV to JSON Converter
Paste CSV data and instantly convert to a clean JSON array. Handles headers automatically.
Data
✂️
Remove Duplicate Lines
Paste any text and instantly remove duplicate lines. Case-sensitive or insensitive.
Data
📝
Word & Character Counter
Count words, characters, sentences, paragraphs, and reading time. Instant as you type.
Data
🔍
Outlier Detector
Paste numbers and detect outliers using IQR or Z-score method. Visual highlight of anomalies.
Data
🔬
Data Type Detector
Upload a CSV and instantly detect the data type of each column — int, float, date, boolean, string.
Data
❓
Missing Values Checker
Upload a CSV and see the percentage of missing values per column. Identify gaps in your data.
Data
📊
Frequency Distribution
Paste a column of values and see count and percentage for each unique value. Instant frequency table.
Data
↕️
Number Sorter
Paste a messy list of numbers and sort ascending or descending. Removes blanks automatically.
Data
📋
CSV Column Extractor
Upload a CSV, select which columns to keep, and download the filtered file instantly.
Data
🔗
VLOOKUP Simulator
Match two tables on a key column — just like Excel VLOOKUP. No Excel needed. Paste and go.
Data
🏢
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1🧮
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6%
Percentage Calculator
Calculate percentages, percentage change, and what percent one number is of another.
Math
🎲
Random Number Generator
Generate random numbers in any range. Single number, list, or unique set — no repeats.
Math
σ
Standard Deviation Calculator
Paste a list of numbers and get mean, median, mode, variance, and standard deviation instantly.
Math
📉
Correlation Calculator
Enter two sets of numbers and calculate Pearson correlation coefficient with interpretation.
Math
🧪
Sample Size Calculator
Calculate the required sample size for any survey or experiment. Set confidence level and margin of error.
Math
〜
Mean, Median & Mode Calculator
Enter a list of numbers and calculate mean, median, mode, range, and sum instantly.
Math
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