Embed Our Ontario
Legal Calculators.
Put a Kleiman Law calculator on your own website in one line of code. Built for paralegals, accountants, bookkeepers, and property managers who want to give clients a useful, always-current tool. Free — no signup, no API key.
· Maintained by Jonathan Kleiman, J.D.
Free calculators you can drop into any page
Each calculator below runs live from jkleiman.com inside an <iframe>. It inherits nothing
from — and changes nothing on — your site’s styling, and it updates automatically whenever Ontario interest
rates or court rules change. Copy the snippet, paste it into your page, and you’re done.
Prejudgment Interest Calculator
Compute simple interest under s. 128 of the Courts of Justice Act at the correct quarterly rate for the date a claim was issued.
View the full tool →<iframe src="https://www.jkleiman.com/embed/ontario-prejudgment-interest-calculator/" title="Prejudgment Interest Calculator — Kleiman Law" width="100%" height="610" style="border:1px solid #e2ded6;max-width:760px;" loading="lazy"></iframe>
Optional: auto-resize (no scrollbar)
Add this once, anywhere on the same page, so the iframe grows to fit its content:
<script>
window.addEventListener('message', function (e) {
if (e.data && e.data.type === 'kleiman-embed-height') {
document.querySelectorAll('iframe[src*="jkleiman.com/embed/"]').forEach(function (f) {
f.style.height = e.data.height + 'px';
});
}
});
</script> Postjudgment Interest Calculator
Compute the interest accruing on an unpaid judgment under s. 129 of the Courts of Justice Act, from the date of judgment to payment.
View the full tool →<iframe src="https://www.jkleiman.com/embed/ontario-postjudgment-interest-calculator/" title="Postjudgment Interest Calculator — Kleiman Law" width="100%" height="520" style="border:1px solid #e2ded6;max-width:760px;" loading="lazy"></iframe>
Optional: auto-resize (no scrollbar)
Add this once, anywhere on the same page, so the iframe grows to fit its content:
<script>
window.addEventListener('message', function (e) {
if (e.data && e.data.type === 'kleiman-embed-height') {
document.querySelectorAll('iframe[src*="jkleiman.com/embed/"]').forEach(function (f) {
f.style.height = e.data.height + 'px';
});
}
});
</script> Filing Fee Calculator
Get the exact court fee for a claim, defence, motion, default judgment, or trial date under O. Reg. 332/16 — before you file.
View the full tool →<iframe src="https://www.jkleiman.com/embed/ontario-small-claims-court-filing-fee-calculator/" title="Filing Fee Calculator — Kleiman Law" width="100%" height="1810" style="border:1px solid #e2ded6;max-width:760px;" loading="lazy"></iframe>
Optional: auto-resize (no scrollbar)
Add this once, anywhere on the same page, so the iframe grows to fit its content:
<script>
window.addEventListener('message', function (e) {
if (e.data && e.data.type === 'kleiman-embed-height') {
document.querySelectorAll('iframe[src*="jkleiman.com/embed/"]').forEach(function (f) {
f.style.height = e.data.height + 'px';
});
}
});
</script> Cost Award Calculator
See the most a judge can order the losing side to pay — the 15% representation-fee cap, disbursements, and double costs after an offer to settle.
View the full tool →<iframe src="https://www.jkleiman.com/embed/ontario-small-claims-court-cost-award-calculator/" title="Cost Award Calculator — Kleiman Law" width="100%" height="1810" style="border:1px solid #e2ded6;max-width:760px;" loading="lazy"></iframe>
Optional: auto-resize (no scrollbar)
Add this once, anywhere on the same page, so the iframe grows to fit its content:
<script>
window.addEventListener('message', function (e) {
if (e.data && e.data.type === 'kleiman-embed-height') {
document.querySelectorAll('iframe[src*="jkleiman.com/embed/"]').forEach(function (f) {
f.style.height = e.data.height + 'px';
});
}
});
</script> Limitation Period Calculator
Estimate the presumptive deadline to start a claim under the Limitations Act, 2002 — with special deadlines and notice traps flagged.
View the full tool →<iframe src="https://www.jkleiman.com/embed/ontario-limitation-period-calculator/" title="Limitation Period Calculator — Kleiman Law" width="100%" height="910" style="border:1px solid #e2ded6;max-width:760px;" loading="lazy"></iframe>
Optional: auto-resize (no scrollbar)
Add this once, anywhere on the same page, so the iframe grows to fit its content:
<script>
window.addEventListener('message', function (e) {
if (e.data && e.data.type === 'kleiman-embed-height') {
document.querySelectorAll('iframe[src*="jkleiman.com/embed/"]').forEach(function (f) {
f.style.height = e.data.height + 'px';
});
}
});
</script> Defence Deadline Calculator
Served with a Plaintiff’s Claim? Count your 20-day deadline to file a Defence, gauge your risk of being noted in default, and see what to file next.
View the full tool →<iframe src="https://www.jkleiman.com/embed/ontario-small-claims-court-defence-deadline-calculator/" title="Defence Deadline Calculator — Kleiman Law" width="100%" height="560" style="border:1px solid #e2ded6;max-width:760px;" loading="lazy"></iframe>
Optional: auto-resize (no scrollbar)
Add this once, anywhere on the same page, so the iframe grows to fit its content:
<script>
window.addEventListener('message', function (e) {
if (e.data && e.data.type === 'kleiman-embed-height') {
document.querySelectorAll('iframe[src*="jkleiman.com/embed/"]').forEach(function (f) {
f.style.height = e.data.height + 'px';
});
}
});
</script> More calculators — filing fees, cost awards, postjudgment interest, limitation periods, and the defence deadline tool — are being rolled out as embeddable widgets. Want one that isn’t here yet? Let me know and I’ll prioritize it.
Simple terms
- Free to embed on any website, commercial or not.
- Please keep the “Powered by Kleiman Law” attribution link intact — it’s how the tool stays free.
- The calculators are general information for Ontario, not legal advice, and don’t create a lawyer–client relationship.
- Don’t alter the calculation logic or misrepresent the results as your own legal advice.
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