Our Mission
Starting and growing a business shouldn't require expensive software or complex tools. ChartAtlas provides free calculators that help you make informed decisions - whether you're launching your first side hustle or running an established business.
From figuring out your breakeven point to setting freelance rates that cover your costs, our tools take the guesswork out of business planning. Every calculator is designed to answer a real question that business owners actually face.
We believe every entrepreneur deserves access to the insights they need to succeed, regardless of budget or technical expertise.
What We Offer
- Profit Calculators
Calculate margins, markups, and actual take-home profit
- Pricing Tools
Set rates that cover costs and generate fair income
- ROI Analysis
Evaluate investments, payback periods, and returns
- Tax Estimators
Plan for quarterly taxes and self-employment obligations
How Our Calculators Work
Transparency about our approach and limitations
Standard Formulas
We use established business and financial formulas. For example, our breakeven calculator uses the standard formula: Fixed Costs ÷ (Price - Variable Cost per Unit). No proprietary or unverified methods.
Input Validation
Calculators include validation warnings when inputs seem unusual (e.g., negative prices, unrealistic percentages). This helps catch data entry errors that could lead to misleading results.
Regular Updates
Tax calculators are updated annually to reflect current IRS rates and brackets. Platform fee calculators (Etsy, Uber, etc.) are updated when those services change their fee structures.
Clear Limitations
Each calculator includes a disclaimer explaining that results are estimates. We can't account for every variable in your specific situation. Always consult qualified professionals for major decisions.
What We Believe
Accessible
Business tools should be available to everyone, regardless of budget. No paywalls, no premium tiers, no barriers to entry.
Private
Your business data is yours. All calculations happen locally in your browser - we never see or store your numbers.
Practical
Every calculator solves a real problem. We focus on tools people actually need, not impressive-sounding features that don't help.
Frequently Asked Questions
Common questions about ChartAtlas
Is ChartAtlas really free?
Yes, completely free. All 115+ calculators are available without any payment, subscription, or account creation. We don't have premium tiers or paywalled features. The calculators are funded through optional advertising that doesn't interfere with functionality.
Do you store or sell my data?
No. All calculations happen locally in your web browser using JavaScript. Your numbers are never sent to our servers, stored in databases, or shared with anyone. When you close the browser tab, your data is gone unless you've copied the shareable link.
How accurate are the calculators?
Our calculators use standard business formulas and are designed to provide useful estimates for planning purposes. However, they cannot account for every variable in your specific situation. We recommend using results as a starting point and consulting with qualified professionals (accountants, financial advisors, attorneys) for significant business decisions.
Who built ChartAtlas?
ChartAtlas is built by developers who understand the challenges of running a business. The calculators are designed to answer real questions that entrepreneurs, freelancers, and small business owners face every day - from pricing services to understanding profit margins.
Can I suggest a new calculator?
Absolutely! We're always looking to add calculators that solve real business problems. Visit our contact page or use the "Suggest a Calculator" feature to share your ideas. We prioritize requests based on how many people would benefit.
Why don't you require an account?
We believe business tools should be immediately accessible without barriers. Creating accounts adds friction and raises privacy concerns. By running calculations entirely in your browser, we eliminate the need for accounts while keeping your data completely private.