About CalcTools
CalcTools is a collection of free online calculators for the calculations people run most often — mortgage payments, personal income tax, take-home salary, interest, BMI, unit conversion, dates and ages. Our goal is simple: fast, accurate, private tools that work for everyone.
Our tools
- Finance: mortgage (equal payment / equal principal), income tax 2026, take-home pay, simple & compound interest, discount
- Health: BMI with categories and advice
- Conversion: length / weight / temperature / area / volume / speed, number bases
- Dates: countdown, date difference, age
- Everyday: percentage, area, random numbers, bill split, electricity cost
What makes us different
- Completely free — no registration, no paywall
- Private — every calculation runs in your browser; nothing is uploaded
- Bilingual — full English & Chinese interface
- Responsive — great on phone, tablet and desktop
Credits
This site is modified and localized from the open-source static calculator project CalcSmart; the original author retains copyright of the original project. We redesigned the styles, removed third-party tracking, localized content and added legal pages.
Contact
📧 Email: [email protected]
🌐 Domain: calctools.playonlineminigame.top
Questions, suggestions or cooperation — we would love to hear from you via the email above.
CalcTools 收录了人们最常用的免费在线计算器——房贷月供、个人所得税、税后工资、利息、BMI、单位换算、日期与年龄。我们的目标很简单：为每个人提供快速、准确、保护隐私的工具。
我们的工具
- 财务：房贷（等额本息/等额本金）、2026 个税、税后工资、单复利、折扣
- 健康：BMI 分类与健康建议
- 换算：长度/重量/温度/面积/体积/速度、进制
- 日期：倒计时、日期差、年龄
- 生活：百分比、面积、随机数、AA 分账、电费
我们的特点
- 完全免费——无需注册、无付费墙
- 保护隐私——所有计算在浏览器中完成，不上传任何数据
- 双语——完整的英文与中文界面
- 响应式——手机、平板、电脑均有良好体验
致谢
本站基于开源静态计算器项目 CalcSmart 修改定制，原作者保留原始项目著作权。我们在原项目基础上重设计了样式、移除第三方统计、本地化内容并补充了法律页面。
联系方式
📧 邮箱：[email protected]
🌐 域名：calctools.playonlineminigame.top
如有问题、建议或合作意向，欢迎通过上述邮箱联系我们。