Esperanto matches two degrees or manners with tiel ... kiel ...: tiel longa kiel “as long as,” tiel rapide kiel “as quickly as,” and tiel, kiel “in the way that.” Tiel points to the degree or manner being measured; kiel introduces the matching standard. Both are invariant table words, so agreement remains on any adjective that they modify.
Equal degree with adjectives
Place tiel before a gradable adjective and kiel before the comparison standard.
La balkono estas tiel larĝa kiel la salono.
The balcony is as wide as the living room.
La reta versio estas tiel detala kiel la presita.
The online version is as detailed as the printed one.
Ĉu la dua ekzameno estos tiel malfacila kiel la unua?
Will the second exam be as difficult as the first?
—Ĉu la nova oficejo estas tiel silenta kiel la malnova? —Ne, sed ĝi estas same hela.
‘Is the new office as quiet as the old one?’ ‘No, but it is just as bright.’
The construction places both referents at the same point on the relevant scale. It does not claim that the quality is high in absolute terms. Unu ĉambro povas esti tiel malgranda kiel la alia “one room can be as small as the other” even if neither is extremely small.
The adjective still agrees with its noun:
Ni bezonas tiel fortajn ŝraŭbojn kiel tiuj uzitaj ekstere.
We need screws as strong as those used outside.
Fortajn agrees with the plural accusative object ŝraŭbojn. The standard tiuj uzitaj ekstere has no -n, because the fuller direct comparison is “as strong as those used outside are strong.” Tiel and kiel take no -j or -n.
Equal manner with adverbs and verbs
The same frame compares how actions happen.
La nova maŝino funkcias tiel silente kiel la malnova.
The new machine runs as quietly as the old one.
Mi ne povas tajpi tiel rapide kiel vi.
I cannot type as quickly as you can.
Faru la saŭcon tiel, kiel mi montris al vi.
Make the sauce the way I showed you.
With an adjective or adverb, tiel normally expresses degree: tiel silente means “to the same degree of quietness.” When it modifies the whole action, it can express manner: faru tiel means “do it in that way.” Degree and manner can overlap, but the position of tiel helps reveal its scope.
The last example has a full finite kiel clause. Esperanto does not add ke: comparative kiel itself introduces the standard.
Tiel may be left understood
In a straightforward short comparison, speakers often omit tiel because kiel and the context already make equality clear.
La lago estas profunda kiel la rivero.
The lake is as deep as the river.
Ŝi laboris zorge kiel ĉiam.
She worked as carefully as always.
Both are established patterns. Keeping tiel is particularly useful when teaching, contrasting degrees, or preventing kiel from being read as a role marker. Compare Li laboris kiel instruisto “He worked as a teacher” with Li laboris tiel pacience kiel instruisto kun komencantoj “He worked as patiently as a teacher with beginners.”
The pedagogical default is therefore to retain tiel when equal degree is the central message, while recognizing frequent and neutral omission in actual usage.
Negative equality: ne tiel ... kiel
Negating the first half says that the first value does not reach the second.
La nuna loĝejo ne estas tiel hela kiel la antaŭa.
The current apartment is not as bright as the previous one.
La kunveno ne daŭris tiel longe kiel ni timis.
The meeting did not last as long as we feared.
This often implies a lower degree, but its discourse effect differs from a direct malpli comparison. Ne tiel hela kiel denies an expected equality; malpli hela ol directly ranks the apartment lower. English uses the same tactful contrast between not as bright as and less bright than.
Negation can instead belong inside the standard clause:
Mi klarigos la problemon tiel simple, kiel mi povas, ne tiel teknike kiel hieraŭ.
I’ll explain the problem as simply as I can, not as technically as yesterday.
Here ne rejects a manner for the new explanation, not the existence of the comparison.
Same ... kiel emphasizes sameness
Same can replace or reinforce tiel when exact sameness is foregrounded.
La rezerva aparato funkcias same bone kiel la ĉefa.
The backup device works just as well as the main one.
Ili traktis ĉiujn kandidatojn same kiel pasintjare.
They treated all the candidates in the same way as last year.
Modern usage normally prefers concise same kiel. The longer tiel same kiel is foundational and remains grammatical, but it is emphatic or stylistically heavy in ordinary contemporary prose.
Tiu ŝanĝo koncernas la volontulojn tiel same kiel la dungitojn.
That change concerns the volunteers just as much as the employees.
The single word samkiel is also an accepted compact alternative when it means “just like” and adds a general parallel:
Samkiel hieraŭ, la trajno hodiaŭ alvenis dek minutojn malfrue.
Just like yesterday, the train arrived ten minutes late today.
PMEG recommends not overusing samkiel where independent same expresses the manner itself. In Ŝi kantas same kiel sia fratino, same may mean “in the same manner.” The transparent two-word form is the best default.
Equality is not identity
Equal degree does not mean that two objects are one and the same object. Compare tiel ... kiel with la sama ... kiel.
Ni havas tiel grandan tablon kiel la najbaroj.
We have a table as large as the neighbors’ table.
Ni havas la saman tablon kiel la najbaroj.
We have the same table as the neighbors.
The first compares size and permits two different tables. The second normally identifies the same table or, depending on context, the same model/type. If literal identity matters, make it explicit: Ni kune uzas unu saman tablon “We share one and the same table.”
Quality or kind can also be expressed with tia ... kia in a full correlative pattern, but before a short standard general comparative kiel is normally clearer: urboj kiel Parizo “cities like Paris.” That neighboring system should not be forced into every equal-degree comparison.
Quantity uses tiom ... kiom
Tiel ... kiel compares degree or manner. When the variable is an amount or number, Esperanto normally chooses the -om pair tiom ... kiom.
Ni mendis tiom da picoj, kiom la grupo povis manĝi.
We ordered as many pizzas as the group could eat.
Mi ne havas tiom da libera tempo, kiom vi supozas.
I do not have as much free time as you suppose.
With multe, tiel multe ... kiel is also possible, especially for degree-like emphasis, but tiom da + noun ... kiom transparently marks noun quantity. The dedicated quantity comparison page develops count, mass, and numerical comparisons.
Case and prepositions after kiel
Like ol, comparative kiel does not assign case. A shortened standard keeps the role that it would have in a fuller clause.
Dario respektas la novan estron tiel same kiel mi.
Dario respects the new manager just as I do.
Here mi is the subject of understood respektas.
Dario respektas la novan estron tiel same kiel min.
Dario respects the new manager just as he respects me.
Here min is an object. When the short forms could distract the reader, write the full clause: ... kiel mi respektas ŝin or ... kiel li respektas min.
Prepositions work the same way:
La infanoj sentas sin tiel sekuraj ĉe Marta kiel ĉe sia avino.
The children feel as safe with Marta as with their grandmother.
The repeated ĉe shows that two settings are being compared.
Punctuation and information packaging
No comma is normally needed before a short standard: tiel alta kiel mi. A finite or deliberately parenthetical kiel clause may be separated by a comma: Faru ĝin tiel, kiel ni interkonsentis. The comma helps mark the clause boundary; it does not change kiel into another kind of word.
Neutral order states the measured property first and the standard second. Fronted Kiel ..., tiel ... is possible for balanced rhetoric (formal or literary):
Kiel en la centro, tiel ankaŭ en la antaŭurboj la luoj rapide kreskas.
As in the center, so too in the suburbs rents are rising rapidly.
This paired discourse construction emphasizes parallel validity. It is related to equality but is more rhetorical than ordinary tiel alta kiel.
Common Mistakes
1. Using ol after equality
❌ La kuirejo estas tiel hela ol la salono.
Incorrect — equal degree takes kiel, not ol.
✅ La kuirejo estas tiel hela kiel la salono.
The kitchen is as bright as the living room.
2. Inflecting the particles
❌ Ni serĉas tielajn flekseblajn kablojn kiel la malnovaj.
Incorrect — tiel is invariant and does not become an adjective.
✅ Ni serĉas tiel flekseblajn kablojn kiel la malnovaj.
We are looking for cables as flexible as the old ones.
3. Using tiel da for noun quantity
❌ Mi ne ricevis tiel da mesaĝoj kiel vi.
Incorrect — noun quantity uses tiom da, normally paired with kiom.
✅ Mi ne ricevis tiom da mesaĝoj, kiom vi.
I did not receive as many messages as you did.
4. Treating equality as a comparative increase
❌ La unua motoro estas tiel pli potenca kiel la dua.
Incorrect — pli signals inequality and conflicts with the equality frame.
✅ La unua motoro estas tiel potenca kiel la dua.
The first engine is as powerful as the second.
5. Dropping a required role marker
❌ Mi sentas min same trankvila ĉe la kuracisto kiel hejmo.
Incorrect — the second setting needs the locative relation en.
✅ Mi sentas min same trankvila ĉe la kuracisto kiel en mia hejmo.
I feel as calm at the doctor’s as in my home.
Key Takeaways
- Use invariant tiel ... kiel for equal degree or manner.
- Tiel is often omitted in short comparisons, but retaining it makes equal degree explicit.
- Same ... kiel emphasizes sameness; samkiel is an accepted compact alternative with narrower use.
- Negative ne tiel ... kiel denies that the first value reaches the standard.
- Use tiom ... kiom for quantity, and let the understood clause determine case and prepositions after kiel.
Related Topics
- Comparatives with Pli and MalpliA2 — Compare higher and lower degrees with the invariant particles pli and malpli, and choose correctly among degree, quantity, and equality patterns.
- The Comparison Particle OlB1 — Use the invariant particle ol to introduce standards of unequal comparison, with the correct case, preposition, and clause structure.
- Quantity ComparisonB2 — Compare amounts and counts with pli da, pli multaj, tiom… kiom…, and numerical thresholds while keeping degree and addition distinct.
- Comparing Actions and ClausesC1 — Compare whole actions and propositions with ol and kiel, manage ellipsis and scope, and make tense, case, and parallel structure explicit.
- Tiel: The Demonstrative Manner CorrelativeB1 — Use tiel for a demonstrated manner or degree, and distinguish it from tia, tiom, and tial.
- Kiel: The Question/Relative Manner CorrelativeA2 — Use kiel to ask about manner and degree, introduce manner clauses, and make comparisons without confusing it with kia or kiom.